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Gauntlet® for IRIX® Netperm Table Reference Guide Version 4.1

1. ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax database path path Path of the database that the authentication server uses Example authsrv database usr local etc fw authdb The authentication server uses the authentication database in usr local etc fw authdb 53 Chapter 4 Attribute Reference database pcxdpp only Specifies the pathname of the database that the authentication server uses to check administrative keys for PC Extender to firewall links This attribute is required ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pcexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax database path path Pathname of the database that the authentication server uses to check administrative keys Exa
2. seconds ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax wakeup seconds seconds Number of seconds that the smapd server sleeps between scans of the spool directory Example smapd wakeup 120 The smapd server sleeps for 120 seconds between scans Gauntlet Firewall Manager Environment gt Mail tab gt SMAP gt Wakeup frequency 151 Chapter 4 Attribute Reference welcome msg Specifies the file that the proxy displays as a welcome banner upon successful connection to the proxy ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax welcome msg file file Name of the file the proxy uses as a welcome banner upon successful connection to the proxy If no file is specified the proxy generates a default message Example tn gw welcome msg usr local etc tn welcome txt Displays
3. ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax smap local domain domainnames domainnames Space separated list of domain names Example smap local domain fred com celeste com Allows the local domains fred com and celeste com to receive messages from anywhere log log Specifies that proxies log only the operations listed rather than all operations the default Note that the FTP proxy does not log all FTP operations by default This attribute is equivalent to the log command in previous versions ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax log operations operations Specifies operations the proxies log Refer to the function attribute page 80 for a list of supported FTP functions Valid values for the HTTP proxy are e BINARY Read files e DIR List directories e EX
4. policy http gw_Trusted cyber_masks work_mask leisure_mask work_mask The bitmasks for Cyber Patrol categories that are denied during work time hours The categories are Violence Profanity 0x0001 Partial Nudity 0x0002 Full Nudity 0x0004 Sexual Acts Text 0x0008 cyber_masks leisure_mask Example Gross Depictions Text 0x0010 Intolerance 0x0020 Satanic Cult 0x0040 Drugs Drug Culture 0x0080 Militant Extremist 0x0100 Sex Education 0x0200 Questionable Tllegal amp Gambling 0x0400 Alcohol Tobacco 0x0800 Sports Leisure 0x1000 Not Yet Used 1 0x2000 Not Yet Used 2 0x4000 Search Engines 0x8000 Reserved for future categories Setting these bits has no effect To determine the bitmask for a group of categories use a hexadecimal calculator To determine the bitmask for Violence Partial Nudity Full Nudity and Sexual Text for example enter 0001 for Violence click OR then enter 0002 for Partial Nudity click OR again then 0004 for Full Nudity click OR then enter 0008 for Sexual Acts Text and click OR a final time The result F is the bitmask for these three categories You can perform the same procedure for any combination of categories The bitmasks for Cyber Patrol categories that are denied during leisure time hours The categories are the same as for work_mask policy http gw_Trusted cyber_masks 1FFF FFF All Cyber Patrol categories except Search E
5. port port Name or port number as specified in etc services Hosts from which connections can originate single hosts entire networks or subnets Specify by IP address or hostname The wildcard is valid Hosts to which the plug proxy connects single hosts entire networks or subnets Specify by IP address or hostname Proxy uses a reserved port number when connecting Provided for future extensibility Port on which the plug proxy connects on the remote host Specify the name or port number as specified in etc services port Example gotd gw port qotd plug to gqotd bigu edu port qotd Creates a plug proxy rule for a Quote of the Day server qotd gw which allows all hosts to connect to the Quote of the Day server at Big University on the qotd port Gauntlet Firewall Manager Services gt Plug tab gt Add or Modify gt Port You cannot set this attribute through the Gauntlet Firewall Manager for all proxies 117 Chapter 4 Attribute Reference ports 118 Specifies the ports on the destination host to which the proxy can connect If you do not use this attribute the proxy can connect to any port Without this attribute users can use the TELNET proxy to access any other network service that uses ASCII This attribute is useful if you wish to ensure that the TELNET proxy is used only for accessing TELNET Without this attribute users can designate a destination when they connect to an SSL serve
6. clients Specifies single hosts entire networks or subnets Specify by IP address or hostname The wildcard is valid serverqueue Name of the printer queue on the remote server to which this rule applies deny Commands that clients cannot execute The default allows users to issue all lp commands log Extended logging applies Extended logging includes the number of bytes transferred from client to server and time duration Extended logging does not include data transfer from server to client as this consists mostly of acknowledgments to client s command client Ipcommands Ip commands that the clients can issue when sending jobs through the proxy The space between the and and the list entries is required Valid keywords which correspond to the first level Ip protocol commands are restart print status_sh status_In remove all The deny or log attribute applies to all p commands Example lp gw client 10 0 1 printer lp_sales log restart remove The proxy logs the restart and remove commands when any clients on the inside network 10 0 1 print to the remote printer queue lp_sales on the remote server Gauntlet Firewall Manager Services gt LP tab gt Add or Modify gt Client Queue 43 Chapter 4 Attribute Reference connect timeout Specifies the amount of time the user has to start the client application before the proxy stops listening at the service port This attri
7. ftp gw extended permissions FTP proxy checks for extended permissions when authenticating users Gauntlet Firewall Manager Firewall Rules gt Users tab gt Restrictions Services gt Service tab gt Add or Modify gt Restrictions 69 Chapter 4 Attribute Reference feature 70 Specifies particular features explicitly permitted or denied Denying a feature causes the HTTP proxy to remove the related tags from within the HTML code Lets you control general features rather than specific portions of the HTTP protocol ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax 1 http gw permit deny feature features features Lists particular HTTP features Valid features are e activeX deny removes lt EMBED gt and lt OBJECT gt tags e frames e html2 e cyberpatrol permit activates support for Cyber Patrol software e java deny removes lt APPLET gt tags e script deny removes lt SCRIPT gt tags gt e kanji permit allows Kanji characters as described in RFC 1468 e legacy kanji permit allows Kanji characters as implemented in Gauntlet 3 2 e multipart form blocks a file upload bu
8. MKD Make directory MODE Specify data transfer mode NLST List names of files in directory NOOP Do nothing PASS Specify password PASV Prepare for server to server transfer PORT Specify data connection port PWD Print the current working directory QUIT Terminate session REIN Full user terminate REST Restart incomplete transfer RETR Retrieve a file RMD Remove a directory RNFR Specify rename from filename RNTO Specify rename to filename SITE Nonstandard commands SIZE Return size of a file SMNT Structure mount STAT Return status of server STOR Store a file STOU Store a file with a unique name STRU Specify data transfer structure SYST Show operating system server type TYPE Specify data transfer type USER Specify user name XCUP Change to parent of current working directory XCWD Change working directory 79 Chapter 4 Attribute Reference 80 e XMKD Make a directory e XPWD Print the current working directory e XRMD Remove a directory Valid values for the HTTP proxy are e BINARY Read Files e DIR List Directories e EXEC Exec Commands e FTP FTP Requests e GOPHER Gopher Requests e HTTP HTTP Requests e HTTPREQ HTTP Requests e PLUS Gopher Commands e READ Requests e TEXT Read Files e TYPE Content type of header e WAIS Search Commands e WRITE Write Data Example ftp gw deny function RETRs The FTP proxy does not allow
9. srcaddr address Source IP address and netmask of the packet The wildcard address 0 0 0 0 0 0 0 0 is valid dstaddr address Destination IP address and netmask of the packet The wildcard address 0 0 0 0 0 0 0 0 is valid srcport port Source port of the packet Specify by port number The wildcard is valid dstport port Destination port of the packet Specify by port number The wildcard is valid Example authenIP deny local if ef0 proto TCP srcaddr 192 168 1 0 255 255 255 0 dstaddr 0 0 0 0 0 0 0 0 srcport dstport 25 The firewall denies all TCP connections on its outside interface ef0 on port 25 the SMTP port from one network 192 168 1 0 The command must be on one line It is wrapped here for readability Gauntlet Firewall Manager Environment gt Packet Screening gt Add or Modify gt Deliver traffic locally to the firewall and Deny traffic 95 Chapter 4 Attribute Reference local domain 96 Specifies the domains that are allowed to receive messages from anywhere You always want your local domains to be able to receive mail from anywhere so put all your domain names on this line This attribute and permit relay page 114 together provide the mailer with network knowledge about the domain This helps the mailer guard against relay attacks which occur when an outside host connects to your mail port and uses your mailer to send mail from you to outside your network
10. Idap gw keyword 165 legacy kanji permit deny 70 Inotes gw keyword 166 local 94 96 114 local domain 96 location information 135 log 97 183 Index log smap only 99 logins disallowed after failed 31 maximum incorrect 101 login sh keyword 166 Ip commands from client 42 log 98 Ip gw keyword 167 mail messages maximum recipients 103 maximum size 102 quarantine dir 124 sendmail 129 undelivarable 29 30 manager 99 100 maxbad 101 maxbytes 102 maxchildren See child limit 103 maximum client server connections 40 maxrecip 103 maxsessions 104 mmp keyword 167 mssql gw keyword 168 N netacl gw keyword 168 netconfig keyword 169 netperm table attributes accept count 20 admin user 21 agent 22 184 anon user 24 authenticate 25 authenticate all but pexdpp 25 authenticate pcxdpp only 26 authserver 27 backend 28 badadmin 29 baddir 30 badsleep 31 bind address 32 bind inside 33 block 34 buffer size 35 check server ip 36 child limit 38 circuitexec 39 circuitsperuser 40 circuit timeout 41 client 42 connect timeout 44 content failunsafe 45 content ftpcheck 46 contentscan msg 47 cvp handling 48 cvp server 49 cyber mask 50 database authsrv only 53 database pcxdpp only 54 data port 52 denial msg 55 57 denydest msg 56 destination 58 directory 60 display 61 dssagent 62 dsshost 63 dssk 64 dssport 65 e
11. tempdir Specifies the directory in which the Authenticating HTTP proxy places its temporary files ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax tempdir directory directory Directory in which the Authenticating HTTP proxy places temporary files Example ahttp gw tempdir usr tmp The Authenticating HTTP directory places temporary files in the usr tmp directory 137 Chapter 4 Attribute Reference timeout 138 Specifies the amount of time the proxy is idle with no network activity before disconnecting To disable the timeout feature for a proxy do not set the timeout value to zero Instead set the timeout attribute to a large value such as 10 years 315 360 000 seconds ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy poli
12. Location Proxy Connection header Example http gw deny header user agent http gw deny header x The HTTP proxy removes the user agent header and headers that begin with x before sending the request to the destination host 85 Chapter 4 Attribute Reference help msg 86 Specifies the file that the proxy displays when the user accesses the help command ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax help msg file file Example rlogin gw Displays the file usr local etc rlogin help txt when a user requests access from the rlogin proxy Name of the file the proxy displays when the user accesses the help command If no file is specified the proxy displays a list of internal commands Gauntlet Firewall Manager help msg usr local etc rlogin help txt Services gt Service tab gt Add or Modify gt Help Message hosts authsrv only hosts authsrv only Specifies the hosts that can connect to the authentication server ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig
13. rules 96 97qotd gw port qotd plug to qotd bigu edu port qotd 13 Chapter 3 Policies and Services Denying Proxy Services You can remove proxy services as your security policies change You can use the Proxy Configuration options in the Gauntlet Manager graphical user interface or you can modify the netperm table To remove a proxy service remove or comment out the permit proxy line in the appropriate policy For example assume Yoyodyne no longer wishes to allow users to rlogin from outside networks The administrator modifies the untrusted policy 44 policy untrusted permit proxy rlogin gw Denying Services by Network or Host 14 You can deny services to and from specific networks and hosts You can do this for all the proxies through a policy or for individual proxies When you deny service you can specify by IP address or by host If you specify by IP address proxies deny access based on that IP address Be sure that you explicitly deny all IP addresses a system or site may have Because in most cases a proxy sees an IP address for only a given connection request there are additional considerations when specifying hostnames in permit or deny rules The firewall must perform additional processing steps to convert the address that is in the packet and the hostname that is in the configuration rule to the same format so that it can compare the values If you deny by hostname the proxy must use DNS to
14. sends traps If you do not use this attribute the SNMP agent on the firewall does not send traps ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax snmp manager host host Example snmpd snmp manager 10 0 1 58 SNMP manager to which the SNMP agent on the firewall sends traps Specify by IP address The SNMP agent on the firewall sends traps to the SNMP manager running on the host 10 0 1 58 Gauntlet Firewall Manager Environment gt SNMP Agent tab gt SNMP Manager 133 Chapter 4 Attribute Reference system contact Specifies the information that the SNMP agent supplies as the contact when the network manager sends a request for the system sysContact MIB II variable Use this attribute to provide information about the department to contact about the firewall If you do not use this attribute the firewall uses Trusted Information Systems Inc 1 888 FIREWALL ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck
15. 158 APOP authentication 115 auth option previous version 25 authall option previous version 25 authenIP keyword 158 authenticate 25 authenticate all but pcxdpp 25 authenticate pcxdpp only 26 authentication server database path for PC Extender 54 database pathname 53 extended permissions 69 host 87 maxbad 101 names to check 141 nobogus 106 SNK key string 64 unknown 141 authserver 27 authserv keyword 159 authtype See 28 backend 28 badadmin 29 baddir 30 badsleep 31 banner 47 bind address 32 bind inside 33 block 34 buffer size 35 Cc changing firewall configuration 21 check server ip 36 child limit 38 child processes maximum 38 chroot See directory circuitexec 39 circuit proxy user access 146 181 Index circuitsperuser 40 circuit timeout 41 ck gw keyword 160 client 42 client server connections maximum 40 client to server transfer blocking 34 connect timeout 44 content failunsafe 45 content ftpcheck 46 content scan banner 47 failure message 48 contentscan msg 47 conventions xx cserve gw keyword 161 cvp handling 48 cvp server 49 cyber mask 50 Cyber Patrol blocked categories 50 leisure time 153 D database authsrv only 53 database pcxdpp only 54 data port 52 Defender Security Server 62 63 64 65 denial msg 55 57 denydest msg 56 deny spam 57 destination 58 directory attribute 60 directory for unde
16. 47 Chapter 4 Attribute Reference cvp handling 48 Specifies the type of handling to use when the proxy receives a file or message that failed the content scan ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax cvp handling reject repair reject The proxy discards the failed file or message repair The proxy attempts to repair the message If the repair is successful the proxy delivers the file or message Example http gw cvp handling reject The HTTP proxy discards all files that fail the content scan Gauntlet Firewall Manager Services gt FTP or HTTP tab gt Add or Modify gt Infected File Handling Environment gt Mail gt Infected File Handling cvp server cvp server Specifies the server that the proxy uses for content scanning services ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x gW cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw m
17. IP address to which a proxy is bound Binding a proxy to a particular address allows you to offer that service only for requests to that address This attribute is useful when you have assigned multiple IP addresses to one of your network interface cards and want to allow only a particular type of traffic for one of those addresses You can bind different proxies to different addresses but all of these proxies can use the same port This configuration is useful when you need to offer multiple services on the same port but with different addresses When using bind address you must also run a new version of the proxy create a startup script for the proxy and create a policy that uses the new proxy ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax bind address address address IP address to which you want to bind a proxy Example aol gw bind address 204 255 154 1 Bind the AOL proxy to the IP address 204 255 154 1 bind inside bind inside Specifies the inside interface and address of t
18. The ahttp gw keyword supports the following attributes authserver backend bind address accept count authenticate authserver destination groupid maxsessions password timeout tempdir 157 Chapter 5 Keyword Reference aol gw alerts authenIP 158 The aol gw keyword supports the following attributes accept count bind address buffer size child limit destination directory force_source_address hosts port timeout The alerts keyword supports the following attribute enable The authenIP keyword supports the following attributes forward local authsrv authsrv The authserv keyword supports the following attributes accept count authserver badsleep bind address child limit database dssagent dsshost dsskey dssport hosts maxbad nobogus operation securidhost unknown 159 Chapter 5 Keyword Reference ck gw The ck gw keyword supports the following attributes e authenticate e authserver e circuitexec e circuitsperuser e circuit timeout e connect timeout e denial msg e destination e directory e extended permissions e groupid e help msg e hosts e password change e prompt e server e userid e user servers e user timeout e welcome msg 160 cserve gw cserve gw finger The cserve gw keyword supports the following attributes e accept count e bind address e buffer size e child limit e destination e directory e fo
19. addresses on your trusted networks to use this attribute ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger lp gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax force_source_address on off Example aol gw force_source_address on The plug proxy for America Online uses the IP address of the originating host as the source address of the packet when sending the packet on to the destination host Gauntlet Firewall Manager Services gt Plug tab gt Add or Modify gt Source Address You cannot set this attribute through the Gauntlet Firewall Manager for some proxies forward forward Specifies the name of a host to which the HTTP proxy forwards requests for which it can find no destination information The HTTP proxy uses this information as a last resort when it cannot find any other information in the request This may happen when transparency is not enabled ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv ldap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh
20. comma separated list of multiple keywords indicates the rules applies to all of the applications in the list The keyword usually matches the name of the service or the value of the as flag in the startup script e attribute is a configuration parameter for the application or proxy e valuelist is the value for the specific configuration parameter Some attributes allow multiple values A rule must fit on a single line The length of a line varies by operating system but is usually around 1 024 bytes There is no provision for continuing lines The keyword s attribute and value list can be separated by spaces or tabs Comments in Netperm Tables Comments in Netperm Tables A hash mark at the beginning of a line indicates a comment Applications ignore any text between the hash mark at the beginning of the line and the end of the line If the hash mark appears later in the line applications treat the hash mark as a normal character Applications treat the following line as a comment set timeout to five minutes Applications treat the following line as invalid syntax tn gw timeout 3000 set timeout to five minutes Note Some default comments in the netperm table include information for the substitution driver They begin with subs start and end with subs end Do not delete these lines Netperm Table Keywords The following table lists some common keywords for proxies and other applications You can create your
21. e force_source_address e hosts e port e timeout strmwrks gw The strmwrks gw keyword supports the following attributes e hosts e destination e directory e groupid e userid e timeout 176 syb gw syb gw tn gw The syb gw keyword supports the following attributes accept count bind inside child limit destination directory hosts port timeout The tn gw keyword supports the following attributes accept count authenticate authserver bind address child limit denial msg denydest msg destination directory extended permissions groupid help msg hosts 177 Chapter 5 Keyword Reference VDOLive password change ports prompt timeout userid welcome msg xforwarder xgateway The VODLive keyword supports the following attributes 178 check server ip destination directory hosts timeout whois whois X gw The whois keyword supports the following attributes accept count bind address buffer size child limit destination directory force_source_address hosts port timeout The x gw keyword supports the following attributes directory display hosts prompt require source timeout 179 Index A accept count 20 activeX permit deny 70 Administrator s Guide conventions xx admin user 21 agent 22 ahttp gw keyword 157 alerts keyword 158 alerts logged 66 anon user 24 anonymous FTP server 24 handoff 82 aol gw keyword
22. gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax permit deny absorb forward proto protocol if interface srcaddr address dstaddr address srcport port dstport port permit forward Packets are forwarded from one interface of the firewall to the other as a router does deny forward Packets are neither forwarded from one interface of the firewall to the other nor absorbed for processing as if they were addressed for the firewall The firewall drops these packets absorb forward The firewall accepts these packets as if their destination were the firewall itself and passes them on to the appropriate utility or proxy 75 Chapter 4 Attribute Reference 76 proto protocol The particular protocol for which this rule is valid Valid values are defined in RFC 1700 Specify by protocol name or number The wildcard is valid You can specify a subset of the ICMP protocol Use the following syntax icmp subtype amp subtype amp subtype where subtype specifies one of subtypes of the ICMP protocol Specify by subtype name Valid subtypes are ECHO ECHOREPLY TREQ TREQREPLY MASKREPLY MASKREQ PARAMPROB REDIRECT ROUTERADVERT
23. gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax system contact contact contact Information the SNMP agent supplies as the contact to the SNMP manager If you use spaces in the contact use quotation marks around the information Example snmpd system contact Systems Group 301 555 7135 The SNMP agent sends the information Systems Group 301 555 7135 when queried Gauntlet Firewall Manager Environment gt SNMP Agent tab gt Contact 134 system location system location Specifies the information that the SNMP agent supplies about the location when the network manager sends a request for the system sysLocation MIB II variable Use this attribute to provide information about the location of the firewall If you do not use this attribute the firewall sends unknown ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax system location location location Information the SNMP agent supplies as the location to the SNMP manager If you use spaces in the location use quotation marks around the inf
24. gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax password timeout seconds seconds Number of seconds between authentication requests by the proxy Example ahttp gw password timeout 1800 The authenticating HTTP proxy prompts users to reauthenticate every 30 minutes 1800 seconds 112 peer net peer net Specifies the IP address of networks that are part of the trusted network but are separated from the firewall by a bridge or a router Use this attribute if you have multiple inside networks that you want to reach from hosts using PC Extender If you do not use this attribute hosts using PC Extender can only reach hosts on the network to which the firewall is directly connected ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pcexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger lp gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax peer net network network Network that is part of the trusted network but is separated from the firewall by a bridge or a router Specify by IP address The wildcard is va
25. gw sql gw ftp gw mmp radm ssl gw SNK key string in hex that the authentication server uses when authenticating with the Defender Security Server This value must match the string displayed when you registered your firewall as an agent Shows the SNK key string the authentication server uses dssport dssport Specifies the port that the authentication server uses when communicating with the Defender Security Server You cannot set this attribute through the Gauntlet Firewall Manager Syntax dssport port port Example authsrv dssport 2626 ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw sql gw ftp gw mmp radm ssl gw Port that the authentication server uses when communicating with the Defender Security Server The default port is 2626 The authentication server communicates with the Defender Security Server on port 2626 65 Chapter 4 Attribute Reference enable 66 Specifies the types of alerts that the Gauntlet kernel generates and logs If there is no enable entry all alerts are enabled ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw
26. map the source or destination address in the packet into a hostname If the proxy cannot perform this mapping it considers the address to be unknown Denying Services by Network or Host Denying Access From a Host or Network You can deny access from a particular host or network on a per proxy basis or on a general basis Denying Access by Proxy To deny access by proxy add a deny hosts line to the specific proxy For example Yoyodyne does not want anyone on any system at Big University to have TELNET access to Yoyodyne 50 tn gw deny hosts bigu edu Later Yoyodyne determines they need to deny access only from the dial in systems at Big University 50 tn gw deny hosts dial bigu edu Denying Access From a Host or Network You can also deny access from a particular host or network for all proxies and applications To deny access for all applications add a deny hosts line above the untrusted policies Use a wildcard as the keyword to indicate that the rule applies to all policies You must include this rule above the policy rules The policies are based on permitted hosts Including the deny hosts rule in a policy has no effect because the application is using the permit hosts rule that defines the policy Note that the SMAP proxies do not use the policy rules so you still receive mail from the denied host or network For example Yoyodyne does not want anyone or any service at Big University to communicate with Yo
27. net 113 permissions extended permissions 69 See denial msd denydest msg destination permit relay 114 plug gw keyword 171 plug proxy force_source_address 72 port 116 pop3 gw keyword 171 POP3 proxy pop server 115 pop server 115 port 116 ports 118 POST request 128 printer 120 processes maximum number of child processes 38 per connection 20 prompt 121 proxies group ID 81 internal buffer size 35 related IP address 32 root directory 60 proxy 122 Q quarantine dir 124 186 R radm gw keyword 172 RealAudio 125 RealAudio gw keyword 172 relayed messages 96 114 relay reject 99 require source 126 RETR 98 RFC 76 rlogin gw 172 rlogin proxy password change 110 root directory 60 rsh gw 173 S screening rules firewall destination packets 94 for outside interface 91 script permit deny 70 securidhost 127 send broken post requests 128 sendmail 129 server 130 server to client transfer blocking 34 shellfile 132 smap relayed messages 114 smapd gw 174 SMAPD server badadmin 29 30 wakeup 151 smap keyword 174 SMAP proxy sendmail 129 Index SMAP server temporary files 139 SMTP proxy maximum recipients 103 SNK 106 SNK key string 64 SNMP agent contact information 134 firewall host name 136 location information 135 snmpd gw 175 snmp gw 175 snmp manager 133 SNMP proxy contact agent 22 manager 100 spam
28. permit deny password change permit deny Example Hosts from which users can change their passwords This is equivalent to the passok option in previous versions Hosts from which users cannot change their passwords Including a deny password change rule has the same effect as not including those hosts in a permit password change rule policy trusted permit password change Allows users on the inside network to change their passwords from both the TELNET and rlogin proxies tn gw permit password change password change Allows users to change their passwords using the TELNET proxy If this is the only permit password change rule in the netperm table users can only change their password from the TELNET proxy not from the rlogin proxy Gauntlet Firewall Manager Firewall Rules gt Service Groups tab gt Password Change 111 Chapter 4 Attribute Reference password timeout Specifies the amount of time between authentication requests This attribute is useful if you are using a strong authentication system that uses one time passwords and you do not want to force your users to reauthenticate frequently If you do not use this attribute the proxy asks users to reauthenticate every 300 seconds 5 minutes ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap
29. plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax forward pattern protocol protocol tohost host port pattern Pattern in the URL for which the HTTP proxy uses this rule Quotation marks are not required protocol protocol Protocol that the HTTP proxy uses when communicating with the remote host Valid values are FTP Gopher and HTTP tohost host port Host and port to which the HTTP proxy forwards requests and the port on which it connects Use IP addresses or hostnames Specify ports by port number 73 Chapter 4 Attribute Reference Example http gw forward pub protocol ftp tohost ftp bigu edu The HTTP proxy forwards all requests with a URL starting with the string pub to the host ftp bigu edu using the FTP protocol 74 forward authenIP only forward authenIP only Specifies screening rules that apply to packets that the firewall would normally forward like a router because their destinations are hosts other than the firewall itself The packet screening facility reads rules specified with the authenIP keyword before rules including default Gauntlet firewall rules specified with the netconfig keyword The recommended way to add forward rules is through the packet screening editor in the administration tools ahttp gw gopher gw mssql gw RealAudio strmwrks
30. port number is specified the proxy uses port 80 by default Example http gw handoff fire in yoyodyne com The HTTP proxy on the firewall inside the network fw engineering engineering yoyodyne com hands all requests between the corporate network and the Internet fire in yoyodyne com to the firewall Gauntlet Firewall Manager Services gt HTTP tab gt Add or Modify gt Handoff Host and Handoff Port 83 Chapter 4 Attribute Reference header 84 Specifies HTTP headers that the proxy permits or denies Denying a header causes the HTTP proxy to remove the related information from the request when it sends the header to the destination host ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax http gw permit deny header header header Headers you wish to explicitly permit or deny remove You can specify only one header per line Consult the HTTP 1 0 1 1 specifications for a list of headers Certain headers are always processed by the HTTP proxy and are dealt with specifically Connection Content Length Content Type
31. reject 99 ssl gw 176 STOR 98 strmwrks gw 176 strong authentication password timeout 112 syb gw 177 system contact 134 system location 135 system name 136 T TELNET proxy password change 110 TELNET access 118 tempdir 137 time out before showdown 93 client server connection 41 connect timeout 44 timeout 138 tmp directory 139 tn gw 177 transparency 140 trusted network 33 turning off IP checking 36 U UDP 67 77 undeliverable mail 29 30 unknown 141 url 142 url filter 144 URL prepending 109 user for undeliverable mail 29 userid 145 user servers 146 user timeout 147 Vv virtual net 149 VODLive 148 VODLive keyword 178 Ww wakeup 151 welcome banner 47 welcome message contentscan msg 47 welcome msg 152 welcome msg 152 whois keyword 179 187 Index wildcard characters authenIP 77 client 42 cvp server 49 peer net 113 port list 118 unknown 141 work _ time 153 X X11 proxy permissions 156 require source 126 xforwarder 155 xforwarder 155 xgateway 156 x gw keyword 179 xurl encoded string to be denied 144 188 Tell Us About This Manual As a user of Silicon Graphics products you can help us to better understand your needs and to improve the quality of our documentation Any information that you provide will be useful Here is a list of suggested topics General impression of the document Omission of mat
32. rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax authsrv permit deny hosts hosts hosts Hosts from which the authentication server accepts connections Specify individual systems entire networks or subnets Use IP addresses or hostnames The wildcard is valid Example authsrv permit hosts 127 0 0 1 The authentication server accepts connections only from the firewall itself localhost 87 Chapter 4 Attribute Reference hosts all but authsrv 88 Specifies the hosts for which the proxy uses a particular policy or the hosts that can use the proxy ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw e mbase gw ftp gw mmp radm ssl gw Syntax permit deny hosts policy policy permit hosts hosts deny hosts hosts hosts policy policy Hosts for which the proxy uses a particular poli
33. server to client e stor Scan files that are being transferred from client to server content ftpcheck retr stor When the FTP proxy is used as part of the untrusted policy it scans all files being transferred Gauntlet Firewall Manager Services gt FTP tab gt Add or Modify gt Scan FTP Puts or Scan FTP Gets contentscan msg contentscan msg Specifies the name of the file that the proxy displays as a welcome banner upon successful connection to the proxy when content scanning is enabled If this attribute is not used the proxy generates a default welcome message ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax contentscan msg file file Name of the file that the proxy displays as a welcome banner upon successful connection to the proxy when content scanning is enabled Example ftp gw contentscan msg usr local etc ftp contentscan msg txt The FIP proxy displays the contents of the file usr local etc ftp contentscan msg txt upon successful connection when content scanning is enabled Gauntlet Firewall Manager Services gt FTP tab gt Add or Modify gt CVP Welcome Msg
34. the POP3 server is running This attribute is required for the POP3 proxy when you are using APOP authentication ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax pop server host host Example pop3 gw pop server mail The POP3 proxy accesses the POP3 server running on the inside mail hub mail Gauntlet Firewall Manager Environment gt Mail tab gt POP3 gt POP server location Name of the host on which the POP3 server is running IP address or hostname 115 Chapter 4 Attribute Reference port 116 Specifies the connection rule for this instance of the plug proxy including hosts and ports ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax port port hosts plug to hosts privport port port port hosts plug to hosts privport
35. the file usr local etc tn welcome txt when a user successfully connects to the TELNET proxy Gauntlet Firewall Manager Services gt Circuit tab gt Welcome Services gt Service tab gt Add or Modify Welcome Message 152 work_time work_time Lets you establish work and leisure time hours for the Cyber Patrol filtering software from Microsystems Software which lets you block access to objectionable material This attribute has no effect unless Cyber Patrol is active Refer to the Gauntlet Firewall Administrator s Guide for more information about Cyber Patrol Note Leisure time hours are all hours outside of the defined work time hours See also the cyber_masks on page 50 feature on page 70 and url on page 142 ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger lp gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax work_time day_mask start_time end_time day_mask The bitmask of the day of the week or a range of days from 00 to 7F The bitmasks for the days of the week are e Sunday 0x01 e Monday 0x02 e Tuesday 0x04 e Wednesday 0x08 e Thursday 0x10 153 Chapter 4 Attribute Reference 154 e Friday 0
36. transferring data 35 Chapter 4 Attribute Reference check server ip 36 Specifies whether or not the proxy checks the IP address of the server sending the packets against the IP address in the clients request By default the proxy compares the IP address in the client request to the IP address in the incoming packets If the IP addresses do not match the proxy drops the packet Some multimedia sites use multiple servers to service requests By default the proxy drops packets If your users need to access these types of sites use this attribute to turn off IP checking on incoming packets ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax check server ip 0 1 0 Proxies check the IP address of the incoming packets against the IP address in the client request If the IP addresses do not match the proxy drops the packet Proxies do not check the IP address of the incoming packets against the IP address in the client request check server ip Example mmp gw check server ip 1 The multimedia proxy doe
37. x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax NetShow port port Port on which the NetShow proxy listens for requests Specify by port number or by port name as specified in etc services Example mmp NetShow 1755 The NetShow proxy listens for requests on port 1755 Gauntlet Firewall Manager Services gt NetShow tab gt Ports 105 Chapter 4 Attribute Reference nobogus Specifies that the authentication server indicates that a user ID does not exist when users attempt to log in and fail If this attribute is not specified and a user enters a nonexistent user name the authentication server always responds with a bogus SNK challenge ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax nobogus true Note You must remove or comment out this setting if you wish to disable it The settings nobogus false and nobogus off are not valid Example authsrv nobogus true The authentication server indicates that the user ID does not exist rather than d
38. yoyodyne com The HTTP proxy should use the name firewall user yoyodyne com when prompted for a user name as a password by an anonymous FTP server authenticate all but pcxdpp authenticate all but pcxdpp Specifies whether or not users must authenticate when accessing these proxies Proxies that do not support authentication ignore this setting This is equivalent to the auth and authall options in previous versions ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax authenticate Provided for future extensibility Example policy untrusted authenticate All requests from hosts on the outside network must authenticate Gauntlet Firewall Manager Firewall Rules gt Service Groups tab gt AuthServer 25 Chapter 4 Attribute Reference authenticate pcxdpp only 26 Specifies whether the DPP daemon considers links between the firewall and the PC to be trusted or untrusted If you use the authenticate attribute the DPP daemon considers the link to be private If you do not use the authenticate attribute the DPP daemon considers the link to be trusted This attrib
39. EC Exec commands e FTP FTP requests e GOPHER Gopher requests e HTTP HTITP requests e HTTPREQ HTTP requests e PLUS Gopher commands 97 Chapter 4 Attribute Reference 98 READ Requests TEXT Read files TYPE Content type of header WAIS Search commands WRITE Write data Valid values for the lp proxy are Example policy trusted all print remove restart status In long status sh short log RETR STOR The trusted policy logs only retrieve RETR and storage STOR activities Gauntlet Firewall Manager Services gt FTP tab gt Operations Services gt HTTP tab gt Add or Modify gt Operations You cannot set this attribute through the Gauntlet Firewall Manager for all proxies log smap only log smap only Controls the anti spam anti relay logging If you don t put a log command in the smap portion of your netperm table smap will not make a log entry whenever a spam or relay message is dropped ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax log spam reject relay reject spam reject relay reject Example spam relay reject spam
40. Gauntlet for IRIX Netperm Table Reference Guide Version 4 1 Document Number 007 3822 001 CONTRIBUTORS Written by Renate Kempf based on material from Trusted Information Systems Inc Production by Mary Macanek Engineering contributions by Jessica Humphreys Ed Mascarenhas Dj Padzensky and Mayank Vasa St Peter s Basilica image courtesy of ENEL SpA and InfoByte SpA Disk Thrower image courtesy of Xavier Berenguer Animatica 1998 Silicon Graphics Inc All Rights Reserved The contents of this document may not be copied or duplicated in any form in whole or in part without the prior written permission of Silicon Graphics Inc RESTRICTED RIGHTS LEGEND Use duplication or disclosure of the technical data contained in this document by the Government is subject to restrictions as set forth in subdivision c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 52 227 7013 and or in similar or successor clauses in the FAR or in the DOD or NASA FAR Supplement Unpublished rights reserved under the Copyright Laws of the United States Contractor manufacturer is Silicon Graphics Inc 2011 N Shoreline Blvd Mountain View CA 94043 1389 Silicon Graphics and the Silicon Graphics logo are registered trademarks of Silicon Graphics Inc UNIX is a registered trademark in the United States and other countries licensed exclusively through X Open Company Ltd Gauntlet is a trademark of Trusted Info
41. ROUTERSOLICIT SOURCEQUENCH TIMXCEED TSTAMP TSTAMPREPLY UNREACH specifies that a particular subtype is not permitted amp specifies multiple subtypes that are allowed specifies that any of the listed subtypes are allowed forward authenIP only if interface Name of the interface on which the packet arrives Valid values vary by operating system and type of physical connection The wildcard is valid srcaddr address Source IP address and netmask of the packet The wildcard address 0 0 0 0 0 0 0 0 is valid dstaddr address Destination IP address and netmask of the packet The wildcard address 0 0 0 0 0 0 0 0 is valid srcport port Source port of the packet by port number The wildcard is valid dstport port Destination port of the packet by port number The wildcard is valid Example authenIP permit forward if efl proto UDP srcaddr 102 0 1 120 255 255 5 255 255 dstaddr 10 0 1 33 2552255 255 255 sreport dstport 161 authenIP permit forward if ef0 proto UDP srcaddr 10200 1387255 42553295 5295 dstaddr 10 40 14120 255 259 205 255 sreport dstport 161 The firewall forwards UDP packets which can originate on any port between an SNMP management station 10 0 1 120 on the trusted network and another workstation on the 204 255 154 27 untrusted network of the Gauntlet Intranet Firewall authenIP permit forward if efl proto icmp ROUTERADVERT ROUTERSOLICIT srcadd
42. Service Groups tab gt Destinations Services gt Service tab gt Destinations Services gt Service tab gt Add or Modify gt Destinations 59 Chapter 4 Attribute Reference directory Specifies the directory that the proxy makes its root directory before providing service For the info gw proxy specifies the directory they use as the root of their database This attribute is equivalent to the chroot option in previous versions ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax directory directory directory Specifies the directory that the proxy makes its root directory before providing service Example smap smapd directory var spool smap The smap and smapd proxies use the directory var spool smap as their root directories Gauntlet Firewall Manager Services gt Service tab gt Locked Room 60 display display Specifies the destination display on which applications display ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw net
43. You can easily use the same set of rules for a group of hosts by creating a generic policy describing what these hosts can and cannot do Application Specific Rules In addition to policy rules the netperm table includes configuration information for proxies and other firewall applications such as e Userid and groupid under which a proxy should run e Directories that the proxies should use as their root directories e Messages that proxies should display when denying or accepting requests e Length of idle time before the proxies should terminate the connection e More specific lists of permitted and denied destination networks for a particular proxy Rules for Proxies Suppose for example that the SMAP proxy reads the netperm table and determines the userid under which it should run and the directory into which it should place mail The TELNET proxy reads the netperm table to determine how long a session must be idle before it disconnects the session The specific configuration options for each proxy are described in Chapter 4 Attribute Reference You can also include rules to permit or deny a particular service for requests to specific addresses or networks For example you can configure the HTTP proxy to deny requests Application Specific Rules to a particular host or network All of the other proxies such as the smapd server continue to use the generic policy and send information to that site while the HTTP proxy deni
44. able to which the TELNET and rlogin proxies pass requests for the X proxy Example policy trusted xforwarder usr local etc x gw The TELNET and rlogin proxies use the standard X proxy for requests from the inside network Gauntlet Firewall Manager Services gt Service tab gt Add or Modify gt Xforwarder location 155 Chapter 4 Attribute Reference xgateway Specifies X11 proxy permissions ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger lp gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax permit deny xgateway permit The TELNET and rlogin proxies can accept requests to start the X11 proxy deny The TELNET and rlogin proxies do not accept requests to start the X11 proxy Provided for future extensibility Example policy trusted permit xgateway Allows the hosts on the inside network to start the X11 proxy Gauntlet Firewall Manager Services gt Service tab gt Allow X11 requests 156 Chapter 5 ahttp gw Keyword Reference This chapter lists each keyword and the attributes it can use For more information about a specific attribute refer to its description in Chapter 4 Attribute Reference
45. affic to run 122 proxy Gauntlet Firewall Manager Firewall Rules gt Service Groups tab 123 Chapter 4 Attribute Reference quarantine dir Specifies the directory in which the smapd server places messages that fail the content scan If you are using a content scanning engine to quarantine mail you must specify this attribute ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax quarantine dir directory directory Directory in which the smapd server places messages that fail the content scan Do not include a trailing slash Ensure that this directory has the same owner and permission as the mail spool directory as set by the directory attribute that the smapd server uses Example smapd quarantine dir var mail quarantine The smapd server places files that fail the content scan into the var mail quarantine directory Gauntlet Firewall Manager Environment gt Mail tab gt Quarantine area 124 RealAudio RealAudio Specifies the port on which the RealAudio proxy listens for requests ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw g
46. ager force_source_address 72 Syntax 72 Example 72 Gauntlet Firewall Manager forward 73 Syntax 73 Example 74 forward authenIP only 75 Syntax 75 Example 77 Gauntlet Firewall Manager function 78 Syntax 78 Example 80 Gauntlet Firewall Manager 67 69 71 71 72 77 80 Contents groupid 81 Syntax 81 Example 81 Gauntlet Firewall Manager handoff 82 Syntax for ftp gw 82 Example 82 Gauntlet Firewall Manager Syntax for http gw 83 Example 83 Gauntlet Firewall Manager header 84 Syntax 84 Example 85 help msg 86 Syntax 86 Example 86 Gauntlet Firewall Manager hosts authsrv only 87 Syntax 87 Example 87 hosts all but authsrv 88 Syntax 88 Example 89 Gauntlet Firewall Manager if inside 90 Syntax 90 Example 90 Gauntlet Firewall Manager if outside 91 Syntax 91 Example 91 Gauntlet Firewall Manager 81 82 83 86 89 90 92 Contents keepalive timeout 93 Syntax 93 Example 93 Gauntlet Firewall Manager local 94 Syntax 94 Example 95 Gauntlet Firewall Manager local domain 96 Syntax 96 Example 96 log 97 Syntax 97 Example 98 Gauntlet Firewall Manager log smap only 99 Syntax 99 Example 99 manager 100 Syntax 100 Example 100 Gauntlet Firewall Manager maxbad 101 Syntax 101 Example 101 maxbytes 102 Syntax 102 Example 102 maxchildren 103 maxrecip 103 Syntax 103 Example 103 93 95 98 100 xi Contents
47. and Services 18 Suppose for example that Yoyodyne wants to deny TELNET between 5 00 p m and 11 00 p m 55authsrv deny operation user tn gw time 17 00 23 00 56authsrv permit operation user tn gw 100tn gw authenticate 101ltn gw extended permissions Line 55 denies TELNET access between 5 00 p m and 11 00 p m Line 56 permits TELNET access You must include this rule because you must explicitly permit operations when you specify extended permissions The deny rule must appear before the permit rule because the proxies use the first matching rule If you specify the permit rule before the deny rule the authentication server would never read the deny rule because the permit rule matches all TELNET operations Chapter 4 Attribute Reference This chapter lists and describes all netperm table attributes The chart for each attribute indicates which proxies applications or policies can use that attribute For example a bullet next to tn gw means you can use this attribute for the TELNET proxy A bullet next to policy policy indicates that you can use this attribute in a policy definition All proxies that use this policy use this attribute You can always use any attribute after the wildcard keyword All proxies read this rule Note The http gw keyword in the tables on the following pages indicates the HTTP proxy when authentication is turned on Rules marked with the ahttp gw k
48. ap deny spam spammer spam com Blocks all messages from spammer spam com 57 Chapter 4 Attribute Reference destination 58 Specifies destination hosts and network permissions ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax permit deny destination destination list permit destination list Hosts to which the proxies and applications can send requests deny destination list destination list Example Hosts to which the proxies and applications cannot send requests Single hosts entire networks or subnets Specify by IP address or hostname The wildcard is valid Use the word unknown to match hosts that do not have DNS entries or whose forward and reverse lookups do not match Specify multiple destinations using braces and separating the items with spaces If no destination list is specified no destinations are valid policy restrictive permit destination 192 3 4 Permits applications to send requests to hosts on the 192 3 4 network destination Gauntlet Firewall Manager Firewall Rules gt
49. base gw ftp gw mmp radm ssl gw Syntax cvp server host port host Host running the content scanning server Specify by IP address or hostname Wildcards are not valid port Port on the host on which the content scanning server is running Example ftp gw cvp server 10 0 1 57 18181 The FTP proxy uses a content scanner on the system 10 0 1 57 using port 18181 Gauntlet Firewall Manager Services gt FTP or HTTP tab gt Add or Modify gt CVP HostName and CVP Port Environment gt Mail gt CVP HostName and CVP Port 49 Chapter 4 Attribute Reference cyber_masks 50 Lets you specify what Cyber Patrol categories are blocked for work time hours and leisure time hours Categories not blocked are allowed This attribute has no effect unless Cyber Patrol is active Refer to the Gauntlet Firewall Administrator s Guide for descriptions of each category listed under Syntax Use this attribute as part of a policy rather than for the proxy itself See also the attributes feature on page 70 url on page 142 and work_time on page 153 ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax
50. bute also controls the amount of time the user has to respond to the query asking them to allow the connection ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax connect timeout minutes minutes Number of minutes the proxy waits at the service port for a client application connection before it disconnects Example ck gw connect timeout 3 The user has three minutes to start the client application before the proxy stops listening Gauntlet Firewall Manager Services gt Circuit tab gt Add or Modify gt Connect Timeout 44 content failunsafe content failunsafe Specifies whether or not the content scanning enabled proxies allow data transfers when content scanning is enabled but not working for example the server is unreachable The proxies normally exit when a transfer is attempted while content scanning is broken so that unscanned data cannot enter your protected network If content failunsafe is not used it is off by default the content enabled proxies do not allow data transfers when content scanning is enabled but not working This attribute has no effect when content scanning is not enabl
51. butes e bind address e child limit e destination e directory e groupid e exec e timeout e userid 168 netconfig netconfig NetShow The netconfig keyword supports the following attributes The NetShow keyword supports the following attributes bind inside if inside if outside transparency check server ip destination directory hosts timeout 169 Chapter 5 Keyword Reference nntp gw The nntp gw keyword supports the following attributes e accept count e bind address e buffer size e child limit e destination e directory e force_source_address e hosts e port e timeout pexdpp The pcxdpp gw keyword supports the following attributes e authenticate e database e hosts e peer net e virtual net 170 plug gw plug gw pop3 gw The plug gw keyword supports the following attributes The pop3 gw keyword supports the following attributes accept count bind address buffer size child limit destination directory force_source_address hosts port timeout accept count authenticate authserver bind address child limit database destination directory groupid hosts pop server 171 Chapter 5 Keyword Reference radm timeout userid The radm gw keyword supports the following attribute RealAudio hosts The RealAudio gw keyword supports the following attributes rlogin gw check server ip destination directory hosts timeout T
52. config rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw sql gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax display host displaynumber screennumber host Name of the system to which the display is physically connected displaynumber Number of the display on the system screennumber Number of the screen for the display Example x gw display redwood 10 0 The X gateway displays all X applications on the display attached to the redwood system 61 Chapter 4 Attribute Reference dssagent Specifies the name that is registered as the agent on the Defender Security Server ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw sql gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax dssagent agent agent Name that is registered as the agent on the Defender Security Server Example authsrv dssagent gauntlet Gauntlet is registered as the agent on the Defender Security Server 62 dssho
53. cy finger Ip gw pop3 gw e mbase gw ftp gw mmp radm ssl gw Syntax timeout seconds seconds Number of seconds the proxy is idle before disconnecting Example policy trusted timeout 1800 The trusted policy allows 1800 seconds 30 minutes of idle time before the proxies disconnect Gauntlet Firewall Manager Services gt Service tab gt Timeout tmp directory tmp directory Specifies the directory in which the smapd server creates temporary files during content scanning If you do not use this attribute the smapd server places temporary files in the tmp directory ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger lp gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax tmp directory directory directory Example Directory in which the smapd server creates temporary files during content scanning Do not include a trailing slash character Ensure that this directory has the same owner and permission as the mail spool directory as set by the directory attribute that smapd server uses See directory on page 60 smapd tmp directory var tmp smapd T
54. cy or hosts that can use the proxy Hosts that cannot use the proxy Hosts for which the proxy uses the particular policy When used without the policy option indicates the hosts that can use the proxy Specifies single hosts entire networks or subnets Specify by IP address or hostname The wildcard is valid Name of the policy these hosts use hosts all but authsrv Example permit hosts 10 0 4 policy restrictive All requests from the network 10 0 4 use the policy restrictive rsh gw permit hosts 10 0 1 12 The host 10 0 1 12 can use the RSH proxy ftp gw deny hosts 10 0 1 0 255 255 255 0 All the hosts on the 10 0 1 0 255 255 255 0 subnet cannot use the FIP proxy Gauntlet Firewall Manager Firewall Rules gt Rules tab 89 Chapter 4 Attribute Reference if inside 90 Specifies the name and the IP address of the inside interface of the firewall Used to create local screening rules that accept packets for the inside interface Used to create forward screening rules that absorb packets if transparency is on ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw sql gw ftp gw mmp radm ssl gw Syntax if
55. e 45 38 39 40 41 43 44 Contents content ftpcheck 46 Syntax 46 Example 46 Gauntlet Firewall Manager 46 contentscan msg 47 Syntax 47 Example 47 Gauntlet Firewall Manager 47 cvp handling 48 Syntax 48 Example 48 Gauntlet Firewall Manager 48 cvp server 49 Syntax 49 Example 49 Gauntlet Firewall Manager 49 cyber_masks 50 Syntax 50 Example 51 Gauntlet Firewall Manager 51 data port 52 Syntax 52 Example 52 database authsrv only 53 Syntax 53 Example 53 database pcxdpp only 54 Syntax 54 Example 54 denial msg 55 Syntax 55 Example 55 Gauntlet Firewall Manager 55 vii Contents viii denydest msg 56 Syntax 56 Example 56 Gauntlet Firewall Manager 56 deny spam 57 Syntax 57 Example 57 Blocks all messages from spammer spam com 57 destination 58 Syntax 58 Example 58 Gauntlet Firewall Manager 59 directory 60 Syntax 60 Example 60 Gauntlet Firewall Manager 60 display 61 Syntax 61 Example 61 dssagent 62 Syntax 62 Example 62 dsshost 63 Syntax 63 Example 63 Gauntlet Firewall Manager 63 dsskey 64 Syntax 64 Example 64 dssport 65 Syntax 65 Example 65 Contents enable 66 Syntax 66 Example 67 Gauntlet Firewall Manager exec 68 Syntax 68 Example 68 extended permissions 69 Syntax 69 Example 69 Gauntlet Firewall Manager feature 70 Syntax 1 70 Example 71 Gauntlet Firewall Manager Syntax2 71 Example 71 Gauntlet Firewall Man
56. e account If you do not use this attribute the authentication server disables a user account after five unsuccessful login attempts You cannot set this attribute through the Gauntlet Firewall Manager Syntax maxbad logins logins Example authsrv maxbad 3 ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw The authentication server allows three incorrect login attempts before disabling an account Maximum number of incorrect login attempts a user can make before the authentication server disables the account 101 Chapter 4 Attribute Reference maxbytes Specifies the maximum size in bytes of mail messages that the smap client accepts After receiving the maximum number of bytes the smap client truncates the message and sends the truncated message to the recipient The smap client accepts the remaining data from the sender and discards it If this attribute is not used the smap client does not set a limit on the size of mail messages ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP i
57. e hosts e log e ourname e ports e send broken post requests e timeout e url filter e userid 164 info gw info gw Idap gw The info gw keyword supports the following attributes The ldap gw keyword supports the following attributes accept count bind inside child limit destination directory hosts timeout accept count bind address buffer size child limit destination directory force_source_address hosts port timeout 165 Chapter 5 Keyword Reference Inotes gw login sh 166 The Inotes gw keyword supports the following attributes e accept count e bind address e buffer size e child limit e destination e directory e force_source_address e hosts e port e timeout The login sh keyword supports the following attributes e authserver e bind address e shellfile Ip gw Ip gw mmp The lp gw keyword supports the following attributes accept count bind inside child limit client destination directory groupid hosts log mbase printer timeout userid The mmp keyword supports the following attributes check server ip directory hosts NetShow RealAudio timeout VDOLive 167 Chapter 5 Keyword Reference mssql gw The mssql gw keyword supports the following attributes e accept count e bind inside e child limit e destination e directory e hosts e port e timeout netacl The netacl gw keyword supports the following attri
58. e virtual net attribute the DPP daemon tells the firewall to create rules for each virtual network that you specify Using the virtual net attribute the DPP daemon no longer tells the firewall to create rules for a host if the host is part of the specified virtual network This attribute is optional ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pcexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax virtual net virtualnetworks trusted virtualnetworks Virtual networks Specify by IP address and netmask of the virtual trusted network Specifies that the DPP daemon tells the firewall to create rules that indicate the virtual network is a trusted network 149 Chapter 4 Attribute Reference Example pexdpp virtual net 10 0 10 0 255 255 255 0 trusted The DPP daemon tells the firewall to create one set of rules for the whole 10 0 10 network a trusted network Gauntlet Firewall Manager Environment gt Virtual Networks gt Add 150 wakeup wakeup Specifies the amount of time that the smapd server sleeps between scans of the spool directory for undelivered mail If no value is specified smapd uses a default value of 30
59. ed You cannot set this attribute through the Gauntlet Firewall Manager Syntax content failunsafe on off Example ftp gw content failunsafe on ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger lp gw pop3 gw mbase gw ftp gw mmp radm ssl gw The FTP proxy when content scanning is enabled allows data transfers even when content scanning is not working 45 Chapter 4 Attribute Reference content ftpcheck 46 Specifies the types of transfers for which the FTP proxy should scan the contents of the files Use this attribute as part of a policy rather than for the proxy itself ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax content ftpcheck types types Example policy untrusted Types of transfers for which the FTP proxy scans the contents Valid keywords are e retr Scan files that are being transferred from
60. epts in SMTP dialog Example smap maxrecip 25 The smap client accepts mail with a maximum of 25 recipients 103 Chapter 4 Attribute Reference maxsessions Specifies the maximum number of concurrent sessions that a single process of the HTTP proxy can support When this limit is exceeded the proxy creates a new process to handle the additional load ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax maxsessions sessions sessions Maximum number of concurrent sessions that a single process of the HTTP proxy can support Example ahttp gw maxsessions 10 The authenticated HTTP proxy allows a maximum of ten concurrent sessions for a single process before creating a new process 104 NetShow NetShow Specifies the port on which the NetShow proxy listens for requests ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd
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62. es requests to that site Because the proxies and applications read the netperm table from top to bottom and stop on the first match you must put proxy specific rules before the generic policies When the relevant proxy parses the configuration information it uses the proxy specific rule rather than the more general policy rule For example the FTP proxy includes a specific rule that denies requests to the destination ftp bigu edu You have created a policy for untrusted hosts near the bottom of the netperm table which includes a rule that allows all proxies and applications to send to any destination Because the more restrictive rule is above the generic policy in the netperm table the FTP proxy uses the restrictive rule and denies requests to ftp bigu edu Gauntlet Applications and the Netperm Table Other Gauntlet applications such as the authentication server and the IP screening utility also read configuration information from the netperm table For example configuration information in the netperm table tells the authentication server how many incorrect login attempts to allow before disabling an account How the Netperm Table is Used As part of the startup process a proxy or application reads the netperm table looking for applicable configuration rules It parses the table from top to bottom looking for rules that match its name It also matches wildcard rules that apply to all applications For example the TELNET proxy tn gw l
63. et Firewall Manager 155 xgateway 156 Syntax 156 Example 156 Gauntlet Firewall Manager 156 Keyword Reference 157 ahttp gw 157 aol gw 158 alerts 158 authenIP 158 authsrv 159 ck gw 160 cserve gw 161 finger 161 ftp gw 162 gopher gw 163 gui 163 http gw 164 info gw 165 Idap gw 165 Inotes gw 166 login sh_ 166 Ip gw 167 mmp 167 mssql gw_ 168 netacl 168 netconfig 169 NetShow 169 nntp gw 170 pexdpp 170 xvii Contents xviii plug gw 171 pop3 gw 171 radm 172 RealAudio 172 rlogin gw 172 rsh gw 173 smap 174 smapd 174 snmpd 175 snmp gw 175 ssl gw 176 strmwrks gw 176 syb gw 177 tn gw 177 VDOLive 178 whois 179 x gw 179 Index 181 Audience About This Guide The Netperm Table Reference Guide describes the Gauntlet Firewall network permissions netperm table and explains how to use it Note Trusted Information Systems the manufacturer of the Gauntlet product recommends using the Gauntlet Firewall Manager graphical user interface to configure your firewall However if you have an unusual configuration or need to configure an option that you cannot set through the Gauntlet Firewall Manager the netperm table is available This reference guide is intended for firewall administrators It assumes familiarity with UNIX system administration networking network administration and basic firewall concepts System administrators should be familiar with TCP IP domain name service sendmail and router co
64. eyword are active only when the authentication option of the HTTP is enabled See Netperm Table Format on page 6 for more information on how attributes are used 19 Chapter 4 Attribute Reference accept count 20 Specifies how many processes the proxy forks to listen for connections on a port You cannot set this attribute through the Gauntlet Firewall Manager Syntax accept count processes processes Example http gw accept count 50 Number of processes the proxy should fork The HTTP proxy forks 50 processes to listen for connections ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw admin user admin user Specifies the name of the administrative user for the firewall which the Gauntlet Firewall Manager uses to authenticate before making changes to the firewall s configuration ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw authenIP info gw smap VDOLive authsrv Idap gw smapd whois ck gw Inotes gw snmpd X gw cserve gw login sh snmp gw policy policy finger lp gw mbase gw ftp gw mm
65. feed after the data If you do not use this attribute the HTTP proxy follows the HTTP specifications and does not send a carriage return line feed after sending the data to an HTTP server ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax send broken post requests on off Example http gw send broken post requests on The HTTP proxy does not follow the HTTP specifications and sends a carriage return line feed after sending data Gauntlet Firewall Manager Services gt HTTP tab gt Add or Modify gt Follow conventional posting rules sendmail sendmail Specifies an alternate path for sendmail or another mail delivery program you are using to deliver your mail inside your perimeter ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax sendmail program program Example s
66. g in Netscape Navigator feature Example http gw deny feature java javascript The HTTP proxy removes Java or JavaScript tags from within any HTML accessed through the proxy policy http gw_Trusted permit feature cyberpatrol Cyber Patrol is enabled at the policy level Gauntlet Firewall Manager Services gt HTTP tab gt Add or Modify gt Deny Special Features You cannot set portions of this attribute through the Gauntlet Firewall Manager Syntax 2 Specifies features in which the HTTP proxy restricts HTML to comply with that feature type http gw feature features features Lists particular HTTP features Valid features are frames html2 java script Example http gw feature html2 The HTTP proxy removes from any HTML that it accesses all HTML that does not meet the HTML2 standards Gauntlet Firewall Manager Services gt HTTP tab gt Add or Modify gt Deny Special Features You cannot set portions of this attribute through the Gauntlet Firewall Manager 71 Chapter 4 Attribute Reference force_source_address 72 Specifies that the plug proxy uses the IP address of the originating host as the source address of the packet when sending a request to the destination host If this attribute is not specified the firewall uses its own IP address as the source address of the packet causing all packets to look as if they originated on the firewall You must use officially registered routable
67. gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax for ftp gw ftp gw handoff host port host port The host and port to which the FTP proxy forwards requests and the port on which it connects Use IP addresses or hostnames Specify port by service name or port number If no port number is specified the proxy uses port 21 by default Example ftp gw handoff ftp yoyodyne com The FTP proxy on the firewall hands all requests on port 21 to the FTP server ftp yoyodyne com running on the service network Gauntlet Firewall Manager Services gt FTP tab gt Add or Modify gt Handoff Host and Handoff Port handoff Syntax for http gw Specifies the name of a host to which the HTTP proxy hands the proxy request This allows you to use several proxies such as the HTTP proxy on the firewall and a caching proxy The HTTP proxy communicates with the next proxy as if it were a client rather than another proxy You cannot use this setting in place of specifying the HTTP proxy in your browser The handoff attribute does not work for FTP or Gopher URLs http gw handoff host port host port Specifies the host and port to which the HTTP proxy forwards requests and the port on which it connects Use IP addresses or hostnames Specify port by service name or port number If no
68. he proxies use for communicating with the authentication server authserver 127 0 0 1 7777 Proxies must use the authentication server on the firewall itself using port 7777 Gauntlet Firewall Manager Firewall Rules gt Service Groups tab gt AuthServer and Port 27 Chapter 4 Attribute Reference authtype backend 28 Obsolete Use the authserver attribute see authserver on page 27 Name of the executable to which the authenticating HTTP proxy passes requests after handling the authentication The executable handles FTP Gopher and other protocols ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax backend executable executable Name of the executable to which the authenticating HTTP proxy passes requests after handling the authentication Example ahttp backend usr local etc http gw The authenticating HTTP proxy passes processing to usr local etc http gw badadmin badadmin Specifies the user name to which the smapd server forwards mail that it cannot deliver ahttp gw gopher gw m
69. he rlogin gw keyword supports the following attributes 172 accept count authenticate authserver bind address child limit denial msg denydest msg destination rsh gw rsh gw The rsh gw keyword supports the following attributes directory extended permissions help msg hosts password change prompt timeout welcome msg xforwarder xgateway bind address child limit destination directory extended permissions force_source_address hosts timeout userid 173 Chapter 5 Keyword Reference smap The smap keyword supports the following attributes e deny spam e directory e groupid e local domain e log e maxbytes e maxrecip e permit relay e timeout e userid smapd The smapd gw keyword supports the following attributes e badadmin e baddir e cvp handling e cvp server e directory e groupid e maxbytes e quarantine dir e sendmail e timeout e tmp directory 174 snmpd snmpd snmp gw The snmpd gw keyword supports the following attributes userid wakeup hosts snmp manager system contact system name system location timeout The snmp gw keyword supports the following attributes agent child limit destination groupid directory manager timeout userid 175 Chapter 5 Keyword Reference ssl gw The ssl gw keyword supports the following attributes e accept count e bind address e buffer size e child limit e destination e directory
70. he smapd server creates temporary files in the var tmp smapd directory 139 Chapter 4 Attribute Reference transparency Specifies that the firewall uses inbound to outbound transparency Used to create the packet screening rule in the forward rule set that absorbs packets from inside addresses to outside addresses for handling by the appropriate proxy or service ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax transparency on off on Inbound to outbound transparency is on off Inbound to outbound transparency is off Example netconfig transparency on Inbound to outbound transparency is on 140 unknown unknown Specifies a list of names that the authentication server checks in addition to the authentication database when checking for extended permissions on a per user basis If the user name is not in the authentication database or in the list of names the authentication server logs the attempt and indicates that the user is not valid If the user name is found in the list of names the authentication serve
71. he trusted network inside the firewall Used to create the packet screening rule that denies packets on the outside interfaces with trusted network addresses to prevent IP spoofing ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax bind inside if insideinterface addr insidenetwork insideinterface insidenetwork Example Interface name of the inside interface of the firewall for example ec0 Valid values vary by type of physical connection IP address and subnet mask of a trusted network inside the firewall The wildcard is valid netconfig bind insid if eco addr 1020 lt 1 07255 2555255 0 Inside interface of firewall is ec0 and network inside the firewall uses 10 0 1 addresses 33 Chapter 4 Attribute Reference block 34 Specifies that the FTP proxy does not allow file transfers of designated types ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp g
72. icy restrictive permit destination 192 33 112 Tpolicy restrictive authenticate 8policy restrictive authserver 127 0 0 1 e Line 2 indicates that all proxies and applications should use the restrictive policy for requests from the designated subnet If you specify the policy for only the TELNET tn gw and rlogin rlogin gw proxies instead of for all all other proxies such as the HTTP and FTP proxies skip this policy and use another policy e Lines 4 and 5 indicate that this policy permits the TELNET and rlogin proxies All other proxies with requests from hosts within 204 255 154 0 255 255 255 128 deny the request after parsing these lines e Line 6 indicates that these proxies can send requests to the set of destinations 192 33 112 The TELNET and rlogin proxies deny requests to any other destinations after parsing this line e Lines 7 and 8 indicate that users on these networks must authenticate with the authentication server on the firewall You must put this policy above the trusted policy so the proxies will use these rules rather than the more permissive trusted policy You may also want to create a matching restrictive untrusted policy to restrict access from outside networks to this internal subnet Note that this type of policy may not prevent users on this inside network from reading news and sending e mail The recommended setup for the Gauntlet firewall calls for central mail and news servers on the
73. idle no network activity before disconnecting Overridden by the timeout option of the server attribute for a particular server See server on page 130 ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax circuit timeout minutes minutes Number of minutes without client server activity before disconnecting Example ck gw circuit timeout 15 The client server activity can be idle for 15 minutes before disconnecting Gauntlet Firewall Manager Services gt Circuit tab gt Add or Modify gt Circuit Timeout 41 Chapter 4 Attribute Reference client 42 Specifies the Ip commands that the firewall denies or logs from clients to remote server queues ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax client clients printer serverqueue deny log Ipcommands all
74. ile 132 Syntax 132 Example 132 snmp manager 133 Syntax 133 Example 133 Gauntlet Firewall Manager system contact 134 Syntax 134 Example 134 Gauntlet Firewall Manager 127 128 129 131 133 134 Contents system location 135 Syntax 135 Example 135 Gauntlet Firewall Manager 135 system name 136 Syntax 136 Example 136 Gauntlet Firewall Manager 136 tempdir 137 Syntax 137 Example 137 timeout 138 Syntax 138 Example 138 Gauntlet Firewall Manager 138 tmp directory 139 Syntax 139 Example 139 transparency 140 Syntax 140 Example 140 unknown 141 Syntax 141 Example 141 url 142 Syntax 143 Example 143 Gauntlet Firewall Manager 143 url filter 144 Syntax 144 Example 144 Gauntlet Firewall Manager 144 XV Contents xvi userid 145 Syntax 145 Example 145 Gauntlet Firewall Manager user servers 146 Syntax 146 Example 146 Gauntlet Firewall Manager user timeout 147 Syntax 147 Example 147 Gauntlet Firewall Manager VDOLive 148 Syntax 148 Example 148 Gauntlet Firewall Manager virtual net 149 Syntax 149 Example 150 Gauntlet Firewall Manager wakeup 151 Syntax 151 Example 151 Gauntlet Firewall Manager welcome msg 152 Syntax 152 Example 152 Gauntlet Firewall Manager work_time 153 Syntax 153 Example 154 Gauntlet Firewall Manager 145 146 147 148 150 151 152 154 Contents xforwarder 155 Syntax 155 Example 155 Gauntl
75. inside if insideinterface addr insidelPaddress insideinterface Interface name of the inside interface of the firewall Valid values vary by operating system and type of physical connection InsideIPaddress IP address and subnet mask of the inside interface of the firewall Example netconfig if insid if lel addr 10 051 1003 255 255 255 2559 The inside interface of the firewall is lel and the inside address of the firewall is 10 0 1 100 Gauntlet Firewall Manager Environment gt IP Spoofing tab if outside if outside Specifies the name of an outside or service net interface and the IP address of the outside or service net interface of the firewall Used to create local screening rules that accept packets for the outside interface ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax if outside if outsideinterface addr outsideIPaddress outsideinterface Interface name of the outside or service net interface of the firewall Valid values vary by operating system and type of physical connection outsidelPaddress IP address and subnet mask of firewall s outside or service net interface Exam
76. inside networks The news readers and mail agents on the restricted subnet communicate directly with the news and mail servers These servers which are not on the restricted subnet communicate directly with the firewall Adding Proxy Services If however you are running mail and news servers on the firewall this more restrictive policy does deny e mail and news activities from the restricted subnet Adding Proxy Services You can add proxy services at any point as your security policies change This section addresses the changes you must make to the netperm table to use the proxy See the Gauntlet for IRIX Administrator s Guide for information on other configuration requirements for the various proxies To add a proxy service 1 Add the name of the proxy to the permit proxy line of the appropriate policy 2 Add a section for proxy specific rules above the policy sections These rules can include items such as userid groupid time out and denial messages Consult the reference information for the proxy for information on proxy options For example suppose that Yoyodyne wants to add support for Quote of the Day qotd service for users on its inside networks This involves using the proxy First add a line to the trusted policy 99policy trusted permit proxy qotd gw Next create a section above the policies in which you define the communications rules for the Quote of the Day connection 95 QotD through plug proxy
77. inutes the client server connection is idle before disconnecting for this service server nookay Specifies that the proxy does not prompt the user to confirm before listening on the service port for a connection Example ck gw server oracle host db clientsite com port oracle The circuit proxy provides service for an Oracle server on the host db clientsite com Gauntlet Firewall Manager Services gt Circuit tab gt Server Settings 131 Chapter 4 Attribute Reference shellfile Specifies the name of the file in which the login shell finds information about users and their shells ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv ldap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax shellfile file file Name of the file that contains a list of users and their shells Example login sh shellfile usr local etc login shellfile The login shell program looks in the usr local etc login shellfile file for information about users and their shells 132 snimp manager snmp manager Specifies the IP address of the SNMP manager to which the SNMP agent on the firewall
78. ion on this agent The proxy does not allow the network manager to set information on this agent The proxy allows this agent to send traps to the network manager agent trap The proxy does not allow this agent to send traps to the network manager Example snmp gw permit agent 204 255 154 3 trap The SNMP proxy allows the agent on the system 204 255 154 3 to send traps to the network manager Gauntlet Firewall Manager Services gt SNMP tab gt Configure gt HostName or IP Address 23 Chapter 4 Attribute Reference anon user 24 Specifies the string that the HTTP proxy provides to anonymous FTP servers when prompted for a user name as a password If you do not use this attribute the proxy sends the string httpgw ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax anon user password password String that the HTTP proxy provides to anonymous FTP servers when prompted for a user name as a password Any printable ASCII characters except space or tab are valid Example http gw anon user firewall user
79. isplaying a bogus SNK challenge when users attempt to log in and fail 106 operation operation Specifies explicitly permitted or denied operations for particular users or groups at particular times of day Note The authentication server only uses these rules when the policy or the proxy uses the extended permissions attribute see extended permissions on page 69 ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax authsrv permit deny operation user users group groups service destination options time start end permit operation Operations to be permitted deny operation Operations to be denied user users Specifies names of users for which the proxies use this rule The wildcard is valid group groups Names of groups for which the proxies use this rule The wildcard is valid service Name of a service for which this rule applies Valid values are e ck gw circuit proxy 107 Chapter 4 Attribute Reference 108 destination options time start time end Example authsrv e ftp gw FTP proxy e rlogin gw trlogin proxy e rsh gw rsh proxy e t
80. lerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax denydest msg file file Name of the file the proxy displays when it denies access to a user who tries to access a disallowed destination If no file is specified the proxy generates a default message Example tn gw denydest msg usr local etc tn denydest txt Displays the file usr local etc tn denydest txt when the TELNET proxy denies access to a user Gauntlet Firewall Manager Services gt Service tab gt Add or Modify gt Deny Destination deny spam deny spam Adds unwanted domain names and email addresses to your anti spam database Keep in mind that specifying a particular email address is not foolproof A remote mailer can lie about its address but not about its domain ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax deny spam address address Domain name or email address for which you want to deny all messages Example sm
81. licy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax user timeout minutes minutes Example ck gw user timeout 10 Number of minutes the proxy is active with no client connections before disconnecting The proxy waits ten minutes without an active client connection before disconnecting Gauntlet Firewall Manager Services gt Circuit tab gt Add or Modify gt User Timeout 147 Chapter 4 Attribute Reference VDOLive Specifies the port on which the VDOLive proxy listens for requests ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax VDOLive port port Port on which the VDOLive proxy listens for requests Specify by port number or by port name as specified in etc services Example mmp VDOLive 7000 The VDOLive proxy listens for requests on port 7000 Gauntlet Firewall Manager Services gt VDOLive tab gt Port 148 virtual net virtual net Specifies how the DPP daemon tells the firewall to add rules to the kernel to implement transparency If you do not use the virtual net attribute the firewall adds rules for each trusted host If you use th
82. lid Example pcxdpp peer net 10 0 7 The PC Extender DPP daemon considers hosts on the 10 0 7 to be peer networks Gauntlet Firewall Manager Environment gt Peer Networks tab gt Add 113 Chapter 4 Attribute Reference permit relay Defines one per line the sites that are allowed to send relayed messages that is who is allowed to use your mail gateway to send mail anyway You normally want all your own users to be able to send mail anywhere This attribute and local domain page 96 together provide the mailer with network knowledge about the domain This helps the mailer guard against relay attacks which occur when an outside host connects to your mail port and uses your mailer to send mail from you to outside your network ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax smap permit relay domainname domainnames Domain name allowed to send relayed messages Example smap permit relay fred com smap permit relay celeste com Allows the local domains fred com and celeste com to send relayed messages 114 pop server pop server Specifies the name of the system on which
83. live 93 Chapter 4 Attribute Reference local 94 Specifies screening rules that apply to packets with a destination of the firewall itself Note that the packet screening facility reads rules specified with the authenIP keyword before rules including default Gauntlet firewall rules specified with the netconfig keyword The recommended way to add local rules is through the packet screening editor in the administration tools ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv ldap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax permit deny local proto protocol if interface srcaddr address dstaddr address srcport port dstport port permit local deny local proto protocol if interface The firewall accepts packets for local delivery and processing The firewall does not accept packets for local delivery The firewall drops these packets Protocol for which this rule is valid Valid values are specified in RFC 1770 Specify by protocol name or number The wildcard is valid Name of the interface on which the packet arrives Valid values vary by operating system and type of physical connection The wildcard is valid local
84. liverable mail 30 display 61 182 DPP daemon 26 149 dssagent 62 dsshost 63 dsskey 64 dssport 65 E enable 66 exec 68 extended permissions 141 extended permissions 69 and operation 107 F failed logins 31 feature 70 finger 68 finger keyword 161 firewall changing configuration 21 force_source_address 72 forking processes 20 forward 73 forward authenIP only 75 forward rules 75 frames permit deny 70 FTP anon user 24 backend 28 ftp gw keyword 162 FTP proxy block 34 content scan type 46 default logging 97 handoff 82 Index port 20 requirement 52 function 78 G Gopher backend 28 gopher gw keyword 163 groupid 81 gui keyword 163 H handoff 82 FTP or Gopher URLs 83 header 84 help msg 86 hosts 88 hosts authsrv only 87 html2 permit deny 70 http gw keyword 164 HTTP proxy anon user 24 backend 28 concurrent session maximum 104 denying features 70 forward 73 handoff 83 handoff to FTP or Gopher URLs 83 header 84 permitting features 70 POST request 128 temporary file 137 ICMP protocol 76 if inside 90 if outside 91 info gw keyword 165 inside interface 90 internal buffer size 35 IP address checking 36 force_source_address 72 inside interface 90 outside interface 91 peer net 113 related to proxy 32 IP spoofing 33 J java permit deny 70 K kanji permit deny 70 keepalive timeout 93 L
85. mapd sendmail usr sbin sendmail The smapd server uses the sendmail executable in usr sbin sendmail Gauntlet Firewall Manager Environment gt Mail tab gt SMAP gt Alternate mail program An alternate path for the sendmail executable or other program you are using to deliver mail 129 Chapter 4 Attribute Reference server 130 Specifies a server for which the proxy handles client server connections ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax server service port remote port host remote host hostport port timeout minutes nookay server service port remote port host remote host hostport port Symbolic name for the service Must be unique Used by the proxy to create the menu of available services Port on the remote host to which the circuit proxy connects Specify by service name or port number Name of the remote host to which the circuit proxy connects Specify an individual system Use IP address or hostname This option is required if you are not using transparency Port on which the proxy connects on the remote host timeout minutes Number of m
86. maxsessions 104 Syntax 104 Example 104 NetShow 105 Syntax 105 Example 105 Gauntlet Firewall Manager nobogus 106 Syntax 106 Example 106 operation 107 Syntax 107 Example 108 Gauntlet Firewall Manager ourname 109 Syntax 109 Example 109 password change 110 Syntax 110 Example 110 Gauntlet Firewall Manager password timeout 112 Syntax 112 Example 112 peer net 113 Syntax 113 Example 113 Gauntlet Firewall Manager permit relay 114 Syntax 114 Example 114 xii 105 108 111 113 Contents pop server 115 Syntax 115 Example 115 Gauntlet Firewall Manager port 116 Syntax 116 Example 117 Gauntlet Firewall Manager ports 118 Syntax 118 Example 119 printer 120 Syntax 120 Example 120 Gauntlet Firewall Manager prompt 121 Syntax 121 Example 121 Gauntlet Firewall Manager proxy 122 Syntax 122 Examples 122 Gauntlet Firewall Manager quarantine dir 124 Syntax 124 Example 124 Gauntlet Firewall Manager RealAudio 125 Syntax 125 Example 125 Gauntlet Firewall Manager 115 117 120 121 123 124 125 xiii Contents xiv require source 126 Syntax 126 Example 126 securidhost 127 Syntax 127 Example 127 Gauntlet Firewall Manager send broken post requests 128 Syntax 128 Example 128 Gauntlet Firewall Manager sendmail 129 Syntax 129 Example 129 Gauntlet Firewall Manager server 130 Syntax 130 Example 131 Gauntlet Firewall Manager shellf
87. mple pcxdpp database usr local etc mgmt dpp authdb The authentication server uses the database usr local etc mgmt dpp authdb 54 denial msg denial msg Specifies the file that the proxy displays when it denies access because a user does not have permission to use the proxy ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax denial msg file file Name of the file the proxy displays when it denies access because a user does not have permission to use the proxy If no file is specified the proxy generates a default message Example ftp gw denial msg usr local etc ftp deny txt Displays the file usr local etc ftp deny txt when the FTP proxy denies access to a user Gauntlet Firewall Manager Services gt Service tab gt Add or Modify gt Deny Use Message 55 Chapter 4 Attribute Reference denydest msg 56 Specifies the file the proxy displays when it denies access because a user is trying to access a destination that he or she is not permitted to access ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw a
88. n gw TELNET proxy e all of these proxies Hosts to which the proxies can or cannot send requests Specify individual systems entire networks or subnets Use IP addresses or hostnames The wildcard is valid Specifies particular operations for each protocol that can be controlled Valid values are e ck gw none e ftp gw Consult the ftpd 1 man page e rlogin gw none e rsh gw none e tn gw none Time at which the proxy begins using this rule Specify time in hours and minutes between 00 00 and 23 59 Time at which the proxy stops using this rule Specify time in hours and minutes between 00 00 and 23 59 permit operation group sales tn gw time 08 00 17 00 The sales group is permitted to use TELNET to connect to any destination only between the hours of 8 00 a m and 5 00 p m authsrv permit operation user robert ftp gw ftp yoyodyne com The user robert is permitted to use FTP to connect only to ftp yoyodyne com Gauntlet Firewall Manager Firewall Rules gt Users tab gt Restrictions Services gt Service tab gt Add or Modify gt Restrictions ourname ourname Specifies the host and domain name that the graphical administrative tool or HTTP proxy uses when putting its own name into nontransparent forwarded URLs links Because the firewall may have different hostnames this attribute allows you to specify which hostname to use ahttp gw gopher gw ms
89. nable 66 exec 68 extended permissions 69 Index feature 70 force_source_address 72 forward 73 forward authenIP only 75 function 78 groupid 81 handoff 82 header 84 help msg 86 host authsrv only 87 hosts 88 if inside 90 if outside 91 keepalive timeout 93 local 94 96 114 log 97 manager 99 100 maxbad 101 maxbytes 102 maxrecip 103 maxsessions 104 NetShow 105 nobogus 106 operation 107 ourname 109 password change 110 password timeout 112 peer net 113 pop server 115 port 116 ports 118 printer 120 prompt 121 proxy 122 quarantine dir 124 RealAudio 125 require source 126 securidhost 127 send broken post requests 128 sendmail 129 server 130 shellfile 132 snmp manager 133 system contact 134 system location 135 system name 136 tempdir 137 timeout 138 tmp directory 139 transparency 140 unknown 141 url 142 url filter 144 userid 145 user servers 146 user timeout 147 virtual net 149 VODLive 148 wakeup 151 welcome msg 152 work _ time 153 xforwarder 155 xgateway 156 NetShow 105 NetShow keyword 169 network management agent 22 nntp gw keyword 170 nobogus 106 0 operation 107 outname 109 outside interface 91 P packet screening edito 75 passok option See passok 110 185 Index password 24 password_change 110 password timeout 112 PC Extender 26 peer net 113 pexdpp gw keyword 170 peer
90. netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger lp gw pop3 gw sql gw ftp gw mmp radm ssl gw Syntax enable options none options none Specifies the types of alerts the Gauntlet kernel generates and logs Valid options are e TCP packets sent to TCP ports without active listeners e UDP packets sent to UDP ports without active listeners e Source source routed packets e Sedir ICMP redirects e Screen packets dropped by the local or forward packet screen The Gauntlet kernel does not generate security alerts for any of the above activities enable Example alerts enable TCP UDP The Gauntlet kernel generates security alerts for packets sent to TCP and UDP ports without active listeners Gauntlet Firewall Manager Reports gt Alerts tab 67 Chapter 4 Attribute Reference exec 68 Specifies a program that the proxy invokes to handle a service This attribute is equivalent to the exec option in previous versions ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger lp gw pop3 gw mbase gw ft
91. nfiguration Structure of This Guide This reference guide has the following chapters e Chapter 1 Understanding the Netperm Table describes the netperm table including policy and application specific rules e Chapter 2 Netperm Table Setup explains how to modify the netperm table and explains netperm table syntax e Chapter 3 Policies and Services explains how to create new policies add or deny proxy services deny services by network or host and control services by user group or time e Chapter 4 Attribute Reference lists all netperm table attributes and provides the information you need to use them xix About This Guide Conventions e Chapter 5 Keyword Reference lists each netperm table keyword and the attributes it can use These type conventions and symbols are used in this guide Italics executable names filenames IRIX commands manual book titles new terms utilities variable command line arguments and variables to be supplied by the user in code examples and syntax statements Fixed width type Code examples prompts and onscreen text Bold fixed width type User input including keyboard keys printing and nonprinting gt Single angle bracket Indicates downward movement in the graphical user interface For example Environment gt Firewall Access tab gt UserName means In the Environment window click the Firewall Access tab then cho
92. nfo gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax maxbytes bytes bytes Maximum size in bytes of mail messages that the smap client accepts Example smap maxbytes 2048 The smap client accepts messages up to a size of 2 MB 102 maxchildren maxchildren maxrecip Obsolete Use the child limit attribute see child limit on page 38 Specifies the maximum number of recipients that the smap client accepts in the SMTP dialog If the SMTP dialog indicates that there are more recipients than allowed then the smap client discards the message The message is not delivered to anyone If this attribute is not used the smap client allows an unlimited number of recipients ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax maxrecip recipients recipients Maximum number of recipients the smap client acc
93. ng Services by User Group or Time 16 Controlling Services by User or Group 17 Controlling Services by Operation 17 Attribute Reference 19 accept count 20 Syntax 20 Example 20 admin user 21 Syntax 21 Example 21 Gauntlet Firewall Manager 21 agent 22 Syntax 22 Example 23 Gauntlet Firewall Manager 23 anon user 24 Syntax 24 Example 24 authenticate all but pexdpp 25 Syntax 25 Example 25 Gauntlet Firewall Manager 25 authenticate pcxdpp only 26 Syntax 26 Example 26 Contents authserver 27 Syntax 27 Example 27 Gauntlet Firewall Manager 27 authtype 28 backend 28 Syntax 28 Example 28 badadmin 29 Syntax 29 Example 29 Gauntlet Firewall Manager 29 baddir 30 Syntax 30 Example 30 Gauntlet Firewall Manager 30 badsleep 31 Syntax 31 Example 31 bind address 32 Syntax 32 Example 32 bind inside 33 Syntax 33 Example 33 block 34 Syntax 34 Example 34 buffer size 35 Syntax 35 Example 35 Contents vi check server ip 36 Syntax 36 Example 37 child limit 38 Syntax 38 Example 38 Gauntlet Firewall Manager circuitexec 39 Syntax 39 Example 39 Gauntlet Firewall Manager circuitsperuser 40 Syntax 40 Example 40 Gauntlet Firewall Manager circuit timeout 41 Syntax 41 Example 41 Gauntlet Firewall Manager client 42 Syntax 42 Example 43 Gauntlet Firewall Manager connect timeout 44 Syntax 44 Example 44 Gauntlet Firewall Manager content failunsafe 45 Syntax 45 Exampl
94. ngines are denied during work time hours while all categories except Search Engines and Sports Leisure are denied during leisure time hours Gauntlet Firewall Manager Services gt HTTP tab gt Add or Modify gt Cyber Patrol 51 Chapter 4 Attribute Reference data port 52 Specifies that the FTP proxy requires FTP data connections to use port 20 the default port specified in the RFC for FTP By default the FTP proxy uses a random nonprivileged port for the data connection Some FTP software packages and routers require that the data connection use port 20 ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax data port port port Port name or number on which the FTP proxy listens for data connections Example ftp gw data port 20 FTP proxy requires data connections on port 20 database authsrv only database authsrv only Specifies the pathname of the database that the authentication server uses This attribute is mandatory unless you compile the authentication server with a specific database path
95. o the cyber_masks on page 50 feature on page 70 and work_time on page 153 ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw 142 url Syntax policy http gw_Trusted permit deny url url permit url URLs permitted for your users deny url URLs denied to your users url An entire URL or a substring of a URL e jpg matches all URLs with jpg somewhere in the URL e yoyodyne com matches all URLs with yoyodyne com in the URL e ftp matches all URLs with ftp in the URL Example policy http gw_Trusted permit url yoyodyne com You want your users to be able to access any URL in the yoyodyne com domain even if Cyber Patrol has it blocked Gauntlet Firewall Manager Services gt HTTP tab gt Add or Modify gt URL Filtering 143 Chapter 4 Attribute Reference url filter Specifies characters that you want to deny ina URL ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd
96. ooks for rules that match tn gw and The proxy goes through these steps 1 It uses the rules to determine if it can accept the request from the source address 2 It determines whether the requested service is an explicitly permitted service m If the request is not permitted the proxy denies it m If the request is permitted the proxy uses the other rules to determine whether it has to authenticate the request and whether it can send the request to the specified destination Chapter 1 Understanding the Netperm Table The application also finds and uses rules for itself in the netperm table For example using the default untrusted policy the TELNET proxy allows TELNET requests from any outside network to any destination The proxy also uses the untrusted policy to determine that it has to authenticate the user and it gets information about which server it should use to authenticate the user Chapter 2 Netperm Table Setup This chapter provides important information about netperm table setup You can modify the netperm table using your favorite text editor Note Be sure to make a backup copy of the original netperm table Do not edit in the section labeled Computer Generated Area between the BEGIN WARNING and END WARNING marks With a few exceptions you do not need to restart the proxies for the changes to take effect Each time the proxies start new processes they check the last modification time of the ne
97. ormation Example snmpd system location Rockville Third Floor Room 468 The SNMP agent sends the information Rockville Third Floor Room 468 when queried Gauntlet Firewall Manager Environment gt SNMP Agent gt Firewall Location 135 Chapter 4 Attribute Reference system name Specifies the information that the SNMP agent supplies about the name of the agent when the network manager sends a request for the system sysName MIB II variable Use this attribute to provide information about the hostname of the firewall If you do not use this attribute the firewall sends its fully qualified domain name ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax system name name name Information the SNMP agent supplies as the location to the SNMP manager Specify by hostname or IP address If you use spaces in the name use quotes around this information Example snmpd system name fire in yoyodyne com The SNMP agent sends the information fire in yoyodyne com when queried Gauntlet Firewall Manager Environment gt SNMP Agent gt Firewall Name 136 tempdir
98. ose User Name XX Chapter 1 Understanding the Netperm Table The netperm table usr local etc netperm table contains configuration information for the Gauntlet Firewall The kernel proxies and other applications read configuration information from this table The recommended method of configuring the Gauntlet Firewall is through the Gauntlet Firewall Manager graphical user interface Edit the netperm table only if you e Have an unusual configuration such as four network interface cards e Need to configure an option that you cannot set through the Gauntlet Firewall Manager Changes you make to the netperm table may conflict with the settings generated by the Gauntlet Firewall Manager This chapter describes the Gauntlet Firewall s network permissions netperm table by discussing the different types of rules e Policy Rules on page 2 e Application Specific Rules on page 2 Chapter 1 Understanding the Netperm Table Policy Rules Policies are collections of general configuration information Policies allow you to closely map your security requirements to the configuration of your Gauntlet firewall Gauntlet configuration policies often include information such as e Types of proxies that the firewall can start e Permitted or denied destinations for requests e Authentication requirements The source address of the request is the basis for a policy You define policies for a set of hosts
99. own keywords Be sure that the keyword matches the value for the as name flag you used when starting the proxy in a startup script Table 2 1 Common Keywords and Associated Applications Keyword Application ahttp gw Authenticating HTTP proxy using the HTTP proxy aol gw America Online proxy using the plug proxy with as alerts IPFS authenIP IP screening configuration applications authsrv Authentication server ck gw Circuit proxy cserve gw CompuServe proxy using the plug proxy with as finger Proxy for finger ftp gw FTP proxy Chapter 2 Netperm Table Setup Table 2 1 continued Common Keywords and Associated Applications Keyword Application gopher gw gui http gw info gw Inotes gw login sh Ip gw mssql gw mbase gw mmp netacl fingerd netacl ftpd netacl rlogind netacl telnetd netconfig NetShow nntp gw pexdpp plug gw policy name pop3 gw radm RealAudio rlogin gw Gopher proxy using the HTTP proxy with as Gauntlet Firewall Manager HTTP proxy Web and Gopher server Info proxy Lotus Notes proxy using the plug proxy with as Login shell Line printer proxy Microsoft SQL proxy MediaBase proxy Multimedia proxy Network access control proxy running finger service Network access control proxy running FTP service Network access control proxy running rlogin service Network access control proxy running telnet service IP screening configuration applications NetShow pr
100. oxy using the mmp proxy NNTP news proxy using the plug proxy with as PC Extender DPP daemon Plug proxy Policy POP3 mail proxy Remote administration scripts RealAudio RealVideo proxy using the mmp proxy Rlogin proxy Attributes in Netperm Tables Table 2 1 continued Common Keywords and Associated Applications Keyword Application rsh gw smap smapd snmpd snmp gw ssl gw strmwrks gw syb gw tn gw VDOLive whois x Sw Remote shell proxy SMTP mail client SMTP mail server SNMP network management agent SNMP network management proxy SSL proxy using the plug proxy with as Streamworks proxy Sybase proxy TELNET proxy VDOLive proxy using the mmp proxy whois proxy using the plug proxy with as X11 proxy Attributes in Netperm Tables Attributes vary by proxy and application though some attributes are common to multiple applications Consult the reference information in Chapter 4 Attribute Reference for more information on applicable attributes and values Chapter 3 Policies and Services This chapter tells you how to create new policies add or deny proxy services deny services by network or host and control services by user group or time The chapter has the following sections Creating New Policies Creating New Policies on page 11 Adding Proxy Services on page 13 Denying Proxy Services on page 14 Denying Services by Ne
101. p Syntax admin user user user Name of the administrative user for the firewall This account must exist in the authentication database Example gui admin user fwadmin The Gauntlet Firewall Manager prompts for authentication information from fwadmin before making changes to the firewall s configuration Gauntlet Firewall Manager Environment gt Firewall Access tab gt UserName 21 Chapter 4 Attribute Reference agent 22 Specifies the name of a network management agent that the SNMP proxy can contact ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax permit deny agent host get get set set trap trap permit deny host get get set Iset trap Agents to which the proxy can send information Agents to which the proxy cannot send information Name of a network management agent that the SNMP proxy can contact Specify by IP address or hostname The proxy allows the network manager to access information on this agent The proxy does not allow the network manager to access information on this agent The proxy allows the network manager to set informat
102. p gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax exec program options program Name of the program to invoke options Command line options for the program Example netacl fingerd exec bin cat usr local etc finger txt The netacl daemon invokes the cat program to display the file usr local etc finger txt for finger requests extended permissions extended permissions Specifies whether the proxies check for extended permissions for users as they authenticate Checking for extended permissions tells the authentication server to obey the attribute s keywords when it reads the netperm table This attribute is equivalent to the extend and extnd options in previous versions When you turn on extended permissions the proxies that use extended permissions deny all operations You must then explicitly permit the proxies to allow activities by creating rules using the operations attribute Use care when specifying extended permissions for policies ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax extended permissions Example
103. p gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax circuitexec programs programs Location and name of the program that the circuit proxy runs once it allows a connection from the client program Example ck gw circuitexec usr local etc circuit The circuit proxy is in usr local etc Gauntlet Firewall Manager You cannot set this attribute through the Gauntlet Firewall Manager 39 Chapter 4 Attribute Reference circuitsperuser Specifies the maximum number of client server connections that can be active in one user session ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax circuitsperuser circuits circuits Maximum number of client server connections that can be active in one user session Example ck gw circuitsperuser 12 A user can have 12 active sessions Gauntlet Firewall Manager Services gt Circuit tab gt Add or Modify gt Circuits allowed per user 40 circuit timeout circuit timeout Specifies the amount of time the client server connection is
104. people to retrieve RETR files http gw deny function FTP The HTTP proxy does not allow FTP requests through the HTTP proxy Gauntlet Firewall Manager Services gt FTP tab gt Operations Services gt HTTP tab gt Add or Modify gt Operations groupid groupid Specifies the group ID the proxy uses when running ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv ldap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax groupid group group Name of the group either a name or numeric ID from the etc group file Example info gw groupid uucp The Info Server runs using the group ID of uucp Gauntlet Firewall Manager Services gt Service tab gt GroupID 81 Chapter 4 Attribute Reference handoff 82 Specifies the name of a host to which the FTP proxy or HTTP proxy hands the proxy request This allows you to redirect FTP or HTTP requests to another system running an FTP or HTTP server such as an anonymous FTP server running on your service net ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info
105. ple netconfig if outside if wel adar 204 255 154 100 255 255 255 255 Firewall outside interface is wel firewall the outside address is 204 255 154 100 netconfig if outside if we2 addr 204 255 154 30 255 255 255 255 Firewall service net interface is we2 IP address of we2 is 204 255 154 30 91 Chapter 4 Attribute Reference Gauntlet Firewall Manager Environment gt IP Spoofing tab 92 keepalive timeout keepalive timeout Specifies the amount of time that the Gauntlet Firewall Manager waits for activity from the client before shutting itself down If you do not use this attribute the Gauntlet Firewall Manager waits 7200 seconds 2 hours for activity before shutting itself down ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax keepalive timeout seconds seconds Example gui keepalive timeout 1800 Number of seconds that the Gauntlet Firewall Manager waits for activity from the client before shutting itself down Gauntlet Firewall Manager waits 30 minutes 1800 seconds before shutting itself down Gauntlet Firewall Manager Environment gt Firewall Access tab gt Keep A
106. pool smap badmail Places the undelivered mail in the var spool smap badmail directory Gauntlet Firewall Manager Environment gt Mail tab gt SMAP gt Place undeliverable mail here badsleep badsleep Specifies for how long the authentication server disallows logins from a user who has attempted and failed to log in five times in a row ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger lp gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax badsleep seconds seconds Number of seconds the authentication server sleeps before allowing login attempts from a user who has attempted and failed to log in five times in a row If this attribute is set to 0 the authentication server allows an unlimited number of unsuccessful login attempts If this attribute is not set the authentication server disables the account after the user attempts and fails to log in five times in a row Example authsrv badsleep 1200 The authentication server sleeps for 20 minutes 1200 seconds after five unsuccessful login attempts 31 Chapter 4 Attribute Reference bind address 32 Specifies the
107. r This SSL connection connects to the remote service which may or may not be running SSL This attribute is useful if you wish to ensure that the HTTP proxy is used only to connect to standard SSL ports ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax permit deny ports port list permit ports port list List of ports to which the proxy can connect Specify by port number or service name as specified in etc services The wildcard is valid Use the character to deny a particular service deny ports port list List of ports to which the proxy cannot connect You cannot set this attribute through the Gauntlet Firewall Manager ports Example tn gw permit ports 4000 The TELNET proxy allows connections only to port 4000 http gw permit ports 8000 8080 ssl The HTTP proxy allows connections only to a few common HTTP ports 8000 and 8080 and the SSL port 443 and denies connections to every other port 119 Chapter 4 Attribute Reference printer 120 Specifies a mapping from a client s print queue name to a server s host and print queue aht
108. r 10 0 1 120 255 255 255 255 dstaddr T00 T33 255 255 259 255 lt sr port dstport The firewall forwards all ICMP packets except ROUTERADVERT and ROUTERSOLICIT from a host on the trusted network 10 0 1 120 and a host on the untrusted network 10 0 1 33 The commands must be on one line They are wrapped here for readability Gauntlet Firewall Manager Environment gt Packet Screening tab gt Add or Modify gt Permit traffic to forward without any proxy application 77 Chapter 4 Attribute Reference function 78 Specifies particular functions of the protocol that are explicitly permitted or denied ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax ftp gw permit deny function functions functions Specifies functions that are permitted or denied Valid values for the FTP proxy are ABOR Abort previous command ACCT Specify account ALLO Allocate storage APPE Append to a file CDUP Change to parent of current working directory CWD Change working directory DELE Delete a file HELP Give help information LIST List files in a directory function
109. r assigns the user name to the group unknown ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax permit unknown names names A list of names separated by spaces The wildcard is valid Example authsrv permit unknown scooter hikita penny The authentication server considers scooter hikita and penny to be valid user names when it checks for extended permissions 141 Chapter 4 Attribute Reference url Lets you specify that certain URLs be denied to your users If a user attempts to access a denied URL the result is a message indicating that access to this URL is denied You can use this feature to deny access to any URL whether or not you are using Cyber Patrol If you are using Cyber Patrol these denied sites are in addition to the sites denied by Cyber Patrol You can also allow access to URLs that would otherwise be blocked by Cyber Patrol Note that any URL to which you permit or deny access takes precedence over Cyber Patrol settings Use this attribute as part of a policy rather than for the proxy itself See als
110. rce_source_address e hosts e port e timeout The finger keyword supports the following attributes e accept count e bind address e buffer size e child limit e destination e directory e force_source_address e hosts e port e timeout 161 Chapter 5 Keyword Reference ftp gw The ftp gw keyword supports the following attributes e accept count e authenticate e authserver e bind address e block e child limit e contentscan msg e content ftpchk e cvp handling e cvp server e data port e denial msg e denydest msg e destination e directory e extended permissions e functions e groupid e handoff e help msg e hosts e log e timeout e userid e welcome msg 162 gopher gw gopher gw gui The gopher gw keyword supports the following attributes e accept count e bind address e child limit e destination e directory e forward e groupid e hosts e timeout e userid The gui keyword supports the following attributes e admin user e destination e directory e hosts e keepalive timeout e ourname e timeout 163 Chapter 5 Keyword Reference http gw The http gw keyword supports the following attributes e accept count e anon user e authenticate e backend e bind address e child limit e cvp handling e cvp server e denydest msg e destination e directory e feature e forward e function e groupid e handoff e header
111. reject Enables logging for both relays and spam messages that are dropped Enables logging when relays are dropped Enables logging when spam messages are dropped 99 Chapter 4 Attribute Reference manager 100 Specifies the manager that the SNMP proxy can contact ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax manager manager port agent port trap trap port manager port agent port trap trap port Example Name of the network manager that can use the proxy Specify by IP address or hostname Port on which the agent is listening for queries from the SNMP manager If you do not include the agent port option the proxy uses port 161 Port on which the proxy listens for trap messages from the agents If you do not include the agent port option the proxy uses port 162 snmp gw manager 10 0 1 123 The network manager on 10 0 1 123 can use the SNMP proxy Gauntlet Firewall Manager Services gt SNMP tab gt Manager s Network Address maxbad maxbad Specifies the number of incorrect consecutive login attempts a user can make before the authentication server disables th
112. rmation Systems Inc Lotus Notes is a registered trademark of Lotus Development Corporation Windows is a registered trademark and Windows NT and NewShow are trademarks of Microsoft Corporation RealAudio ia a registered trademark and RealVideo is a trademark of Real Networks Inc VODLive is a trademark of VDOnet Corporation Netscape Navigator is a registered trademark of Netscape Communications Inc Java and JavaScript are trademarks of Sun Microsystems Inc Gauntlet for IRIX Netperm Table Reference Guide Document Number 007 3822 001 Contents About This Guide xix Audience xix Structure of This Guide xix Conventions xx Understanding the Netperm Table 1 Policy Rules 2 Application Specific Rules 2 Rules for Proxies 2 Gauntlet Applications and the Netperm Table 3 How the Netperm Table is Used 3 Netperm Table Setup 5 Precedence in Netperm Tables 6 Netperm Table Format 6 Comments in Netperm Tables 7 Netperm Table Keywords 7 Attributes in Netperm Tables 9 Policies and Services 11 Creating New Policies 11 How to Create a New Policy 11 Example for Creating a New Policy 12 Adding Proxy Services 13 Denying Proxy Services 14 Contents Denying Services by Network or Host 14 Denying Access From a Host or Network 15 Denying Access by Proxy 15 Denying Access From a Host or Network 15 Denying Access to a Host Network or Proxy 16 Denying Access by Proxy 16 Denying General Access to a Host or Network 16 Controlli
113. s not check the IP address of incoming packets against the IP address in the client request 37 Chapter 4 Attribute Reference child limit Specifies the maximum number of child processes that each daemon allows to run at the same time ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax child limit processes processes Maximum number of child processes that each daemon allows to run at a given time If this attribute is set to 0 or is not set the daemon allows an unlimited number of child processes to run at the same time Example tn gw child limit 10 The TELNET proxy allows only ten child processes to run at the same time Gauntlet Firewall Manager Services gt Service tab gt ChildLimit 38 circuitexec circuitexec Specifies the location of the program that the circuit proxy runs once it allows a connection from the client program ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nnt
114. s which services a particular users sees when using the circuit proxy menu ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax user servers user user group group deny service user user group group deny service Example Name of a user who can access a particular service Name of a group who can access a particular service Specifies that the user can use all services except those explicitly denied Names of particular services Must match the name of a service specified through a server attribute ck gw user servers group Grads accounting The group Grads can use the accounting service Gauntlet Firewall Manager Services gt Circuit tab gt User Settings user timeout user timeout Specifies the amount of time the proxy is idle with no active client connections before disconnecting ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw po
115. sql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax ourname hostname hostname Name of the host that the GUI or HTTTP proxy uses when prepending URLs Specify an individual interface Use an IP address or hostname Example gui ourname 10 0 1 100 The GUI displays all pages as being on 10 0 1 100 the inside interface of the firewall http gw ourname fire in yoyodyne com The HTTP proxy if needed prepends fire in yoyodyne com the inside interface of the firewall to all URLs when rewriting them 109 Chapter 4 Attribute Reference password change 110 Specifies password change options for allowing users to change passwords in authentication management system from within the TELNET and rlogin proxies ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax
116. ssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax badadmin user user Name of a user or alias Example smapd badadmin firewalladmin Send mail to the firewalladmin alias Gauntlet Firewall Manager Environment gt Mail tab gt SMAP gt Notify for undeliverable mail 29 Chapter 4 Attribute Reference baddir 30 Specifies the directory in which the smapd server places any spooled mail that it cannot deliver normally ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax baddir directory directory Name of a directory on the same device as the spool directory Do not include a trailing slash character Ensure that this directory exists and has the same owner and permission as the directory that smap normally uses Example smapd baddir var s
117. st dsshost Specifies the name of the host running the Defender Security Server software ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw sql gw ftp gw mmp radm ssl gw Syntax dsshost hostname hostname Name of the host running the Defender Security Server software Specify by IP address or hostname Example authsrv dsshost dimension The Defender Security Server is running on dimension Gauntlet Firewall Manager You cannot set this attribute through the Gauntlet Firewall Manager 63 Chapter 4 Attribute Reference dsskey 64 Specifies the SNK key string that the authentication server uses when authenticating with the Defender Security Server You cannot set this attribute through the Gauntlet Firewall Manager Syntax dsskey snk_key snk_key Example authsrv dsskey 53 94 dd 90 a3 b7 29 el ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger lp gw pop3
118. tp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax printer clientqueue host server printer serverqueue clientqueue Name of a client print queue host server Server on which the remote printer queue is printer serverqueue Name of the remote printer queue to which a proxy sends the print jobs If the server queue is not specified the client s queue name is used as server queue name Example lp gw printer lp_remot host blaze clientsite com printer lp3 Maps the printer queue lp_remote to the queue p3 which is running on blaze clientsite com Gauntlet Firewall Manager Services gt LP tab gt Add or Modify gt Print Server and Server Queue prompt prompt Specifies the prompt the proxies use in command mode ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax prompt prompt prompt String that the pro
119. tperm table If the time has changed the proxies reread the netperm table However there are several proxies that must be restarted when you make changes to certain attributes Chapter 4 Attribute Reference lists each attribute and notes whether restart is necessary This chapter contains information on the netperm table syntax in the following sections e Precedence in Netperm Tables on page 6 e Netperm Table Format on page 6 e Comments in Netperm Tables on page 7 e Netperm Table Keywords on page 7 e Attributes in Netperm Tables on page 9 Chapter 2 Netperm Table Setup Precedence in Netperm Tables Applications and proxies read the rules from the top of the table to the bottom They use the first rule that applies for a particular attribute If there are multiple rules in the table that could apply for an attribute the application uses the first one it finds For example a netperm table attribute contains the following rule smapd userid uucp and later in the file contains the rule smapd userid mail When smapd parses the netperm table it uses the first rule it finds and runs as the user uucp Netperm Table Format Each line in the netperm table contains a separate configuration rule in the format keyword attribute valuelist where e keyword indicates the application to which the rule applies The wildcard indicates the rule is valid for all applications and proxies A
120. ttribute to your authsrv configuration to specify who can perform the operation and what services they can access 2 Add the authenticate attribute to the appropriate policy or proxy to require users to authenticate before using the service 3 Add the extended permissions attribute to the appropriate policy or proxy to indicate that the authentication server should check information specified by the operations keyword For example Yoyodyne wants to permit only members of the group Developer to use the rlogin proxy when accessing outside hosts 55 authsrv permit operation group Developer rlogin gw 100 rlogin gw authenticate 101 rlogin gw extended permissions These commands prevent any other users who are not members of group Developer in the Gauntlet authentication database from using the rlogin proxy Controlling Services by Operation You can permit or deny access to certain proxies by time of day To control access by time of day 1 Add the operations attribute to your authsrv configuration to specify who can perform what operations and what services they can access and when 2 Add the authenticate attribute to the appropriate policy or proxy to require users to authenticate before using the service 3 Add the extended permissions attribute to the appropriate policy or proxy to indicate that the authentication server should check information specified by the operations keyword 17 Chapter 3 Policies
121. twork or Host on page 14 Controlling Services by User Group or Time on page 16 You can create additional policies to fit your security requirements for different groups of inside hosts and networks Remember that all policies are based on the source address of the request Creating a new policy involves modifying the netperm table How to Create a New Policy To create a new policy 1 Add a line indicating e Source networks that use the policy e Name of the policy Add rules indicating which proxies this policy allows Add rules indicating permitted destinations authentication and logging Place the policy lines above or below the section generated by the Gauntlet Firewall Manager as appropriate see Precedence in Netperm Tables on page 6 11 Chapter 3 Policies and Services 12 Example for Creating a New Policy Suppose for example that the generic policy for Yoyodyne uses the default Gauntlet trusted policy The security policy for Yoyodyne calls for restricting a particular group of systems and set of addresses to TELNET and rlogin to a particular set of outside networks To implement this policy you can create a more restrictive policy l define inside hosts who will use the policy 2 permit hosts 204 255 154 0 255 255 255 128 policy restrictive 3 define the policy 4policy restrictive permit proxy netacl telnetd tn gw 5Spolicy restrictive permit proxy netacl rlogind rlogin gw 6pol
122. ui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax RealAudio port port Port on which the RealAudio proxy listens for requests Specify by port number or by port name as specified in etc services Example mmp RealAudio 7070 The RealAudio proxy listens for requests on port 7070 Gauntlet Firewall Manager Services gt RealAudio tab gt Ports 125 Chapter 4 Attribute Reference require source 126 Specifies whether or not users of the X11 proxy when starting the X11 proxy must specify the name of the host from which they will be connecting If you do not use this attribute users do not need to specify the name of the host when starting the X11 proxy ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger lp gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax require source on off Example x gw require source on Users of the X11 proxy m
123. ust specify the name of the host when starting the X11 proxy securidhost securidhost Specifies the name of the firewall that is registered as the client hostname on the ACE Server Because the firewall may have various hostnames this attribute allows you to specify which hostname to use ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax securidhost firewall firewall Name of the firewall that is registered as the client hostname on the ACE Server Specify an individual system Use an IP addresses or hostname Example authsrv securidhost fire in yoyodyne com The SecurID server communicates with the firewall s inside interface as fire in yoyodyne com Gauntlet Firewall Manager You cannot set this attribute through the Gauntlet Firewall Manager 127 Chapter 4 Attribute Reference send broken post requests 128 Specifies whether or not the HTTP proxy sends a carriage return line feed after the data to the HTTP server when sending a POST request Some designers of Web pages have ignored the HTTP specifications when creating their forms These forms always expect to receive a carriage return line
124. ute is optional If you do not specify it the DPP daemon uses the authenticate settings for the trusted or untrusted policy as appropriate ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pcexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax authenticate Provided for future extensibility Example pcxdpp authenticate The DPP daemon considers the link between the firewall and PC Extender to be private authserver authserver Specifies the host that is running the authentication server that the proxies use for authenticating users ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax authserver host port host port Example policy untrusted Host running the authentication server Specify IP address or hostname Port on the host that t
125. w smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw You cannot set this attribute through the Gauntlet Firewall Manager Syntax block input output input The FTP proxy does not allow file transfers from server to client output The FTP proxy does not allow file transfers from client to server Example ftp gw block output The FTP proxy prevents file transfers from client to server buffer size buffer size Specifies the size of the internal buffer that the proxy uses for transferring data If you do not use this attribute the proxy uses a buffer of 16 384 bytes If you use this attribute and specify an invalid value for example a negative number the proxy uses a buffer of 8 192 bytes You cannot set this attribute through the Gauntlet Firewall Manager Syntax buffer size buffer buffer Example ssl gw buffer size 32768 The SSL proxy uses an internal buffer size of 32 768 bytes ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd X gw cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Size of the internal buffer that the proxy uses for
126. x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax url filter filterlist filterlist xurl encoded string of characters that you want to deny in a URL See the HTML RFC or other HTML specification documents for lists of xurl encoded characters Example http gw url filter 0D 0A You do not want to see the carriage return line feed characters in any URLs Gauntlet Firewall Manager Services gt HTTP tab gt Add or Modify gt URL Filtering 144 userid userid Specifies the user ID the proxy uses when running This attribute is equivalent to the user command in previous versions ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax userid user user Specifies the user as a name or a numeric ID from the etc passwd file Example smap smapd userid uucp The smap and smapd processes run as the user uucp Gauntlet Firewall Manager Services gt Service tab gt UserID 145 Chapter 4 Attribute Reference user servers 146 Specifies the servers a particular user can access Also specifie
127. x20 e Saturday 0x40 To determine the bitmask for a range of days use a hexadecimal calculator To determine the bitmask for Monday through Friday for example enter 02 for Monday click OR then enter 04 for Tuesday click OR again and continue through 20 for Friday and click OR a final time The result 3E is the bitmask for Monday through Friday start_time The time of the day when work_time begins using the twenty four hour system sometimes called military time For example 0800 is 8 a m and 1700 is 5 p m end_time The time of the day when work_time ends using the twenty four hour system Example http gw work_time 3E 800 0000 Work time hours are 8 a m to midnight Monday through Friday Gauntlet Firewall Manager Services gt HTTP tab gt Add or Modify gt Cyber Patrol gt Define Work Times xforwarder xforwarder Specifies the location of the executable to which the TELNET and rlogin proxies pass requests for the X proxy Generally specifies the location of the X proxy ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax xforwarder program program Location of the execut
128. xy displays in command mode Quotation marks are not required but are recommended for strings that include spaces Example tn gw prompt Yoyodyne TELNET proxy gt The TELNET proxy displays the prompt Yoyodyne TELNET proxy gt Gauntlet Firewall Manager Services gt Service tab gt Add or Modify gt Command line prompt 121 Chapter 4 Attribute Reference proxy Specifies proxy permissions ahttp gw gopher gw mssql gw RealAudio strmwrks gw aol gw gui netacl rlogin gw syb gw alerts http gw netconfig rsh gw tn gw authenIP info gw NetShow smap VDOLive authsrv Idap gw nntp gw smapd whois ck gw Inotes gw pexdpp snmpd x 2W cserve gw login sh plug gw snmp gw policy policy finger Ip gw pop3 gw mbase gw ftp gw mmp radm ssl gw Syntax permit deny proxy proxy list permit proxy Proxies that this policy allows to run deny proxy Hosts that this policy does not allow to run Including a deny proxy rule has the same effect as not including those proxies in a permit proxy rule proxy list Name of the proxy This name must match the name specified in usr local etc mgmt rc or on the command line to start the proxy If the proxy was started using the as flag use that name here Examples policy restrictive permit proxy ftp gw http gw Allows the FTP and HTTP proxies to run policy restrictive permit proxy webster Allows a plug proxy configured for webster tr
129. yodyne 103 deny hosts bigu edu 140 permit hosts policy outside 15 Chapter 3 Policies and Services Denying Access to a Host Network or Proxy You can deny access to a particular host or network on a proxy or general basis Denying Access by Proxy To deny access by proxy add a deny destination line to the specific proxy For example Yoyodyne does not want anyone on the inside networks to transfer files using FTP from any hosts at Big University 55 ftp gw deny destination bigu edu Denying General Access to a Host or Network You can also deny access to a particular host or network for all proxies and applications To deny access for all applications add a deny destination line to the appropriate policy For example Yoyodyne does not want anyone on the inside network to communicate with Big University 108 policy trusted deny destination bigu edu Note that the SMAP proxies do not use the policy rules so you can still send mail to the denied host or network Controlling Services by User Group or Time 16 You can control access to the following proxies on a per user per group or time of day basis ck gw Circuit proxy ftp gw FTP proxy rlogin gw Rlogin proxy rsh gw Rsh proxy tn gw TELNET proxy Controlling Services by User Group or Time Controlling Services by User or Group You can permit or deny access to certain proxies by user or group as follows 1 Add the operations a

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Gauntlet® for IRIX® Netperm Table Reference Guide Version 4.1