NetScreen-25 User's Guide
Contents
1. IX ll User s Guide2. The NetScreen 25 device offers 100 Mbps of firewall and 20 Mbps of 3DES VPN protecting your LANs as well as public servers such as mail web or FTP GUIDE ORGANIZATION This manual has four chapters and one appendix Chapter 1 Overview provides an overview of the system its ports and power requirements Chapter 2 Installing the Device details how to install the NetScreen 25 device on a desktop or in a rack Chapter 3 Configuring the Device details how to connect the NetScreen 25 device to your network establish a Console session set an IP address for the NetScreen 25 device and access the device using the WebUI Chapter 4 Replacing the Fuse provides procedures on how to replace components on the device Appendix A Specifications provides a list of physical specifications about the NetScreen 25 device NetScreen 25 V Preface COMMAND LINE INTERFACE CLI CONVENTIONS The following conventions are used when presenting the syntax of a command line interface CLI command Anything inside square brackets is optional Anything inside braces is required If there is more than one choice each choice is separated by a pipe I For example set interface ethernetl ethernet2 ethernet3 manage means set the management options for the ethernet1 ethernet2 or ethernet3 interface Variables appear in italic For example set admin user namel password xyz When a CLI command
3. 250 Volts ENVIRONMENTAL Temperature Operating Normal altitude 32 105 F 0 40 Relative humidity 10 90 Non condensing 10 90 The maximum normal altitude is 12 000 ft 0 3 660 m SAFETY CERTIFICATIONS UL CUL CSA CB Austel ICE 60950 EM I CERTIFICATIONS FCC class A BSMI CE class A C Tick VCCI class A A II User s Guide CONNECTORS The RJ 45 twisted pair ports are compatible with the IEEE 802 3 Type 10 100 Base T standard The following table displays the media type and distance for this connector Standard Media Type Mhz Km Maximum Rating Distance 100Base TX Category 5 and higher Unshielded Twisted Pair 100 m UTP Cable NetScreen 25 A III Appendix A Specifications A IV User s Guide Index Index A asset recovery 19 C cables RJ 45 connectors 4 13 twisted pair 13 connecting network interfaces 14 16 connecting power 14 console changing timeout 16 17 initiating a session 15 console port 4 G guide organization v installation guidelines 8 L LEDs Alarm 3 Flash 3 Power 3 Session 3 Status 1 3 Status 2 3 M management software logging on 18 N NetScreen Publications vi P password changing 17 resetting 19 ports console 4 R rack installation guidelines 8 mounting 8 reset 19 7 transparent mode 12 V ventilation 8 NetScreen 25 IX Index
4. Using a vt100 Terminal Emulator on page 15 Setting an IP Address for Managing the Device on page 16 Connecting Using Telnet on page 16 Allowing Outbound Traffic on page 17 Changing Your Admin Name and Password on page 17 Accessing the Device With the WebUT on page 18 Asset Recovery on page 19 Using CLI Commands to Reset the Device on page 19 Using the Asset Recovery Pinhole to Reset the Device on page 20 Note You must register your product at www juniper net support so that certain ScreenOS services such as the Deep Inspection Signature Service can be activated on the device After registering your product use the WebUI or CLI to obtain the subscription for the service For more information about registering your product and obtaining subscriptions for specific services see the System Parameters chapter in Volume 2 of the NetScreen Concepts amp Examples ScreenOS Reference Guide Note If you access the device for the first time using the ScreenOS WebUI graphical interface the Initial Configuration Wizard appears when you log in to the WebUI This Wizard guides you through the configuration described in this chapter For more information about starting the Initial Configuration Wizard refer to the Juniper Networks NetScreen 25 Getting Started Guide NetScreen 25 11 Chapter 3 Configuring the Device OPERATIONAL MODES The NetScreen 25 device supports t
5. appears within the context of a sentence it is in bold except for variables which are always in italic For example Use the get system command to display the serial number of a NetScreen device Note When typing a keyword you only have to type enough letters to identify the word uniquely For example typing set adm u joe j12fmt54 is enough to enter the command set admin user joe j12fmt54 Although you can use this shortcut when entering commands all the commands documented here are presented in their entirety J UNIPER NETWORKS NETSCREEN PUBLICATIONS To obtain technical documentation for any Juniper Networks NetScreen product visit www juniper net techpubs For technical support open a support case using the Case Manager link at http www juniper net support or call 1 888 314 JTAC within the United States or 1 408 745 9500 outside the United States If you find any errors or omissions in the following content please contact us at the e mail address below techpubs comments juniper net vi User s Guide Overview This chapter provides detailed descriptions of the NetScreen 25 chassis Topics explained in this chapter include The Front Panel on page 2 Power and Status LEDs on page 2 Asset Recovery Pinhole on page 4 Console and Modem Ports on page 4 Compact Flash Card Slot on page 4 Ethernet Interfaces on page 5 The Rear Panel on page 5 No
6. harmful interference when the equipment is operated in a commercial environment The equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case users will be required to correct the interference at their own expense The following information is for FCC compliance of Class B devices The equipment described in this manual generates and may radiate radio frequency energy If it is not installed in accordance with NetScreen s installation instructions it may cause interference with radio and television reception This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the specifications in part 15 of the FCC rules These specifications are designed to provide reasonable protection against such interference in a residential installation However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient or relocate the receiving antenna e Increase the separation between the equipme
7. Chapter 3 Configuring the Device 22 User s Guide Replacing the Fuse The NetScreen 25 device uses a 2 5 Amp slow blow fuse rated for 250 Volts To replace a failed fuse on the NetScreen 25 device 1 Take the device off line turn the power switch OFF and disconnect the power cable 2 Using a screwdriver separate the lid of the external fuse cover from the surface of the power outlet 3 Manually remove the fuse assembly from the device 4 To replace the fuse assembly enter the new fuse into the opening and slide it in until the fuse clicks into place 5 Replace the power cable and turn the device power switch ON Reconnect the network cables NetScreen 25 23 Chapter 4 Replacing the Fuse 24 User s Guide Specifications This appendix provides general system specifications for the NetScreen 25 device NetScreen 25 Attributes on page A II Electrical Specification on page A II Environmental on page A II Safety Certifications on page A II EMI Certifications on page A II Connectors on page A III NetScreen 25 A I Appendix A Specifications NETSC REEN 25 ATIRIBUTES Height 1 73 inches 4 4 cm Depth 10 8 inches 27 4 cm Width 17 5 inches 44 5 cm Weight 8 pounds 36 hg ELECTRICAL SPECIFIC ATION AC voltage 100 240 VAC 10 DC voltage 36 to 60 VDC Maximum AC Watts 45 Watts Maximum DC Watts 50 Watts Fuse Rating 2 5 Amps
8. NETSCREEN 25 User s Guide Version 5 0 P N 093 1245 000 Rev B Copyright Notice Copyright O 2005 Juniper Networks Inc All rights reserved Juniper Networks the Juniper Networks logo NetScreen NetScreen Technologies GigaScreen and the NetScreen logo are registered trademarks of Juniper Networks Inc NetScreen 5GT NetScreen 5XP NetScreen 5XT NetScreen 25 NetScreen 50 NetScreen 100 NetScreen 204 NetScreen 208 NetScreen 500 NetScreen 5200 NetScreen 5400 NetScreen Global PRO NetScreen Global PRO Express NetScreen Remote Security Client NetScreen Remote VPN Client NetScreen IDP 10 NetScreen IDP 100 NetScreen IDP 500 GigaScreen ASIC GigaScreen II ASIC and NetScreen ScreenOS are trademarks of Juniper Networks Inc All other trademarks and registered trademarks are the property of their respective companies Information in this document is subject to change without notice No part of this document may be reproduced or transmitted in any form or by any means electronic or mechanical for any purpose without receiving written permission from Juniper Networks Inc ATTN General Counsel 1194 N Mathilda Ave Sunnyvale CA 94089 1206 FCC Statement The following information is for FCC compliance of Class A devices This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC rules These limits are designed to provide reasonable protection against
9. NetScreen 25 device restarts check the following LEDs The Power LED glows green The Status 1 LED blinks green The Ethernet port LEDs for each connected interface glow or blink green For more details about interpreting the port LEDs see Ethernet Interfaces on page 5 PERFORMING INITIAL CONFIGURATION USING THE CLI There are two ways to establish a console session with the NetScreen 25 device Using a vt100 terminal emulator such as Hilgraeve Hyperterminal through an RJ 45 serial cable connected to the console port Using Telnet through a TCP IP network connection to the NetScreen 25 device Connecting Using a vt100 Terminal Emulator To establish a connection to the NetScreen 25 device using a vt100 Terminal Emulator 1 Connect an RJ 45 serial cable between the console port on the NetScreen 25 device and the serial port on your computer 2 Start the vt100 terminal emulator program on your computer Typical settings for a console session are as follows e Baud Rate to 9600 e Parity to No e Data Bits to 8 e Stop Bit to 1 e Flow Control to none 3 Press the ENTER key to see the login prompt 4 At the login prompt type netscreen NetScreen 25 15 Chapter 3 Configuring the Device At the password prompt type netscreen Note Use lowercase letters only Both login and password are case sensitive Optional By default the console times out and terminates automatically after 10 min
10. The example is NOT a requirement for initial configuration You can also use the Outgoing Policy Wizard in the WebUI management application to create access policies for outbound traffic See Accessing the Device With the WebUI on page 18 for information on accessing the WebUI application Changing Your Admin Name and Password Because all NetScreen products use the same admin name and password netscreen it is highly advisable to change your admin name and password immediately Enter the following commands set admin name name_str set admin password pswd_str save For information on creating different levels of administrators see Administration in the NetScreen Concepts amp Examples ScreenOS Reference Guide NetScreen 25 17 Chapter 3 Configuring the Device ACCESSING THE DEVICE WITH THE WEBUI To access the NetScreen 25 device with the WebUI management application 1 Connect your computer or your LAN hub to the Trust zone interface Ethernet port 1 as described in Connecting the Device to a Network on page 14 Launch your browser enter the IP address of the Trust zone interface in the URL field and then press Enter For example if you assigned the Trust zone interface of the device the IP address of 10 100 2 183 16 enter the following 10 100 2 183 The NetScreen WebUI software displays the login prompt M Remember my name and pa ird Enter netscreen in both the Admin Name and Passw
11. button located behind the asset recovery pinhole for four to six seconds per NetScreen 25 Asset Recovery Pinhole A serial console message states that the Configuration Erasure Process has been initiated and the system sends an SNMP SYSLOG alert The Status LED blinks amber once every second After the first reset is accepted the power LED blinks green The serial console message now reads Waiting for 2nd confirmation Release the button for one second Push the button again for four to six seconds A serial console message states Second push has been confirmed The Status LED lights amber for one half second then returns to the blinking green state Continue to press the button until the message Configuration Erase sequence accepted unit reset The system generates SNMP and SYSLOG alerts to configured SYSLOG or SNMP trap hosts Note During a reset there is no guarantee that the final SNMP alert sent to the receiver before the reset will be received 20 User s Guide Asset Recovery 4 Release the button 5 The device now erases the configuration and restarts If you do not follow the complete sequence the reset process cancels without any configuration change and the serial console message states Configuration Erasure Process aborted The status LED returns to blinking green If the unit did not reset an SNMP alert is sent to confirm the failure NetScreen 25 21
12. creen 25 device to the internal switch router or hub in your LAN see Connecting the Device to a Network on page 14 Open a Telnet session to 192 168 1 1 In Windows click Start gt gt Run type telnet 192 168 1 1 and then click OK At the Username prompt type netscreen User s Guide Performing Initial Configuration Using the CLI 4 At the Password prompt type netscreen Note Use lowercase letters only Both Username and Password are case sensitive 5 Optional By default the console times out and terminates automatically after 10 minutes of idle time To change the timeout value execute the following command set console timeout number where number is the length of idle time in minutes before session termination To prevent automatic termination specify a value of 0 Allowing Outbound Traffic By default the NetScreen 25 device does not allow inbound or outbound traffic nor does it allow traffic to or from the DMZ You need to create access policies to permit specified kinds of traffic in the directions you want You can also create access policies to deny and tunnel traffic The following access policy permits all kinds of outbound traffic from any point on the Trust network to any point on the Untrust network set policy outgoing inside any outside any any permit save Important Your network might require a more restrictive policy than the one created in the example above
13. dCoscngsnno a epi ra proaasitos 12 Route Mod caian EA A 12 The NetScreen 25 Intefa ces oococccccccononnncnnnnninnnoncncnononononrnnconnono nan ncccnnnnnnns 13 Connecting the Device to a NetWOTK iisi 14 Performing Initial Configuration Using the CU oonnnccnnnninonaccannnaacnnonanacnnno 15 Connecting Using a vt100 Terminal EmulatOT oonncnninnninnnnnnncnnacncccnnacananncnnns 15 Setting an IP Address for Managing the Device conmnicinnninnnninicccnacncnnnncanncnnns 16 Connecting Using Tele Einicio 16 Allowing Outbound Tame usina aia 17 Changing Your Admin Name and Password isisisi 17 Accessing the Device With the WeDUI ccinoccconnnccnnnnonncnnanncnnnoncnnonancncnnnnos 18 ASSCURE COVEN csi ee ranas 19 Using CU Commands to Reset the Device coooncocnninninicnnncnccnconccnnanncnannnan nano 19 Using the Asset Recovery Pinhole to Reset the Device nsssssccscccsrsees 20 Chapter d Replacing ME FUSE siii ai A 23 Appendik A Specht ui iia A I Netscreen 25 AtnDUTES oisinnean aenn ane aes site A ll NetScreen 25 iii Contents ElecmcalSpecine atoh ao A ll Environmental dani A ll Safety Certifica GONS siririna na i n A ll EMG Gi ailOMS areren na tense aa a oiia ais A ll COMME CTLONS narra a a a A III ALO LES ERAN PE EAI EI ED T EEE A SN A ENVEE TENENT IX 1 iV User s Guide Preface The Juniper Networks NetScreen 25 device provides security for small and medium sized companies as well as enterprise branch and remote offices
14. e following CLI command unset admin device reset 1 At the login prompt type the serial number of the device At the password prompt type the serial number again The following message appears Lost Password Reset You have initiated a command to reset the device to factory defaults clearing all current configuration and settings Would you like to continue y n NetScreen 25 19 Chapter 3 Configuring the Device Press the y key The following message appears Reconfirm Lost Password Reset If you continue the entire configuration of the device will be erased In addition a permanent counter will be incremented to signify that this device has been reset This is your last chance to cancel this command If you proceed the device will return to factory default configuration which is System IP 192 168 1 1 username netscreen password netscreen Would you like to continue y n Press the y key to reset the device You can now login in using netscreen as the default admin name and password Using the Asset Recovery Pinhole to Reset the Device You can also reset the device and restore the factory default settings by pressing the asset recovery pinhole To perform this operation you need to make a console connection as described in Connecting Using a vt100 Terminal Emulator on page 15 Locate the asset recovery pinhole on the front panel Using a thin firm wire such as a paper clip push the
15. f The device is not receiving power Alarm System Alarm red Critical alarm failure of hardware component or software module such as a cryptographic algorithm amber Major alarm Low memory lt 10 remaining High CPU utilization gt 90 Log memory full Sessions full Maximum number of VPN tunnels reached Firewall attacks detected off No alarms Status 1 System Status blinking green Normal operation green Booting up normally Status 2 Reserved off Reserved for future use Session Session amber Session utilization is between 70 and 90 puzanen red Session utilization is greater than 90 off Normal operation Flash Compact Flash green The card is installed Aaa blinking green Read write activity is detected off Compact Flash slot is empty NetScreen 25 Chapter 1 Overview Asset Recovery Pinhole The asset recovery pinhole is a switch that resets the device to its original default settings To use this switch insert a stiff wire such as a straightened paper clip into the pinhole Warning Because resetting the device restores it to the original default configuration any new configuration settings are lost and the firewall and all VPN services become inoperative Console and Modem Ports The Console port is a RJ 45 serial console port connector for VT100 terminal emulator programs to perform local configuration and administration The Modem port is a RJ 45 serial console port connector for es
16. fficient to keep equipment at acceptable temperatures without an additional circulation system Ensure that the room in which you operate the device has adequate air circulation Do not work alone if potentially hazardous conditions exist Look carefully for possible hazards in your work area such as moist floors ungrounded power extension cables frayed power cords and missing safety grounds The product should be installed in a restricted area to prevent personal injury from exposure to DC voltage Warning To prevent abuse and intrusion by unauthorized personnel install the NetScreen 25 device in a locked room environment EQUIPMENT RACK MOUNTING The NetScreen 25 device comes with accessories for mounting the device in a standard 19 inch equipment rack Equipment Rack Installation Guidelines The location of the chassis the layout of the equipment rack and the security of your wiring room are crucial for proper system operation Use the following guidelines while configuring your equipment rack Enclosed racks must have adequate ventilation Such ventilation requires louvered sides and a fan to provide cooling air When mounting a chassis in an open rack be sure that the rack frame does not block the intake or exhaust ports If you install the chassis on slides check the position of the chassis when it is seated all the way into the rack In an enclosed rack with a ventilation fan in the top equipment highe
17. fies a logical tunnel interface This interface is for VPN traffic NetScreen 25 13 Chapter 3 Configuring the Device CONNECTING THE DEVICE TO A NETWORK The following illustration shows typical cabling for 10 100 Base T networks This example uses the default interface bindings for the Ethernet ports Internet 3 Internal Network To add a NetScreen 25 device to your network 1 Optional Install the NetScreen 25 device in an equipment rack see Equipment Rack Mounting on page 8 2 Make sure that the power switch on the device is turned OFF 3 Connect the power cable included in the product package to the NetScreen 25 power outlet at the rear of the device and to a power source Warning To prevent personal injury from exposure to DC voltage always replace the insulating cap after installing power cables 4 Connect an RJ 45 cross over cable from the Trust zone interface Ethernet port 1 to the internal switch router or hub Note Check your router hub switch or computer documentation to see if these devices require any further configuration In addition see if it is necessary to switch OFF the power to any new device you add to the LAN 5 Connect an RJ 45 straight through cable from the Untrust zone interface Ethernet port 3 to the external router 14 User s Guide Performing Initial Configuration Using the CLI 6 Flip the power switch to the ON position 7 After the
18. nt and receiver e Consult the dealer or an experienced radio TV technician for help e Connect the equipment to an outlet on a circuit different from that to which the receiver is connected Caution Changes or modifications to this product could void the user s warranty and authority to operate this device Disclaimer THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY CONTACT YOUR JUNIPER NETWORKS REPRESENTATIVE FOR A COPY Contents ia A oli A assem aeneatne E e T P T V Guide Org aniza On asia as v Command Line Interface CU CONVENTIONS ooccccccnnnnnnnnnnannnanananananananononons vi Juniper Networks NetScreen Publications oooonnccnninicnnncccicnonccncnanncconanacnnn vi Capetillo 1 The Font Panel siria 2 Powerand Sta CUSILEDS nasales 2 Asset RECOVe anios iia 4 CONSOLE aiid Modeni ROMS carr e an 4 Compact Fast Card iia alarcon iS 4 ENemetlMt ma COS ii aa 5 The Rear Panel asii anilla 5 Chapter2 Installing Me DEE jad R EER 7 General Installation Guidelines accionaria aan 8 Equipment Rack MOUNTING as 8 Equipment Rack Installation Guidelines ias 8 Equipment Rack Accessories and Required Tools 9 Netseren 25 RICK Mol Esa aaa dci 9 Chapter 3 Connounng me Device ud id 11 Operational Modes ana 12 Tansoarent Mo
19. ord fields then click Login Use lowercase letters only The Admin Name and Password fields are both case sensitive The NetScreen WebUI application window appears Note NetScreen Security Manager 2004 NSM and NetScreen Rapid Deployment RD If you are using NSM you can optionally configure NetScreen appliances with RD Refer to the Rapid Deployment Getting Started Guide for more information User s Guide Asset Recovery ASSET RECOVERY If you lose the admin password you can use one of the following procedures to reset the NetScreen device to its default settings This reset destroys any existing configurations but restores access to the device Warning Resetting the device will delete all existing configuration settings and the firewall and VPN service will be rendered inoperative Note After you successfully reset and reconfigure the NetScreen device you should back up the new configuration setting As a precaution against lost passwords you should back up a new configuration that contains the NetScreen default password This will ensure a quick recovery of a lost configuration You should change the password on the system as soon as possible Using CU Commands to Reset the Device To perform this operation you need to make a console connection as described in Connecting Using a vt100 Terminal Emulator on page 15 Note By default the device recovery feature is enabled You can disable it by entering th
20. r in the rack can draw heat from the lower devices Always provide adequate ventilation for equipment at the bottom of the rack Baffles can isolate exhaust air from intake air The best placement of the baffles depends on the airflow patterns in the rack 8 User s Guide Equipment Rack Mounting Equipment Rack Accessories and Required Tools Rack mounting requires the following accessories and tools 1 Phillips head screwdriver not required 4 screws to match the rack if the thread size of the screws provided in the NetScreen 25 product package do not fit the thread size of the rack The included rack mount bracket kit Netscreen 25 Rack Mount To rack mount the NetScreen 25 device 1 Screw the rack mount brackets to each side of the chassis as shown below O O O A 9 O O O 0000009 e PDODODO 2 Screw the left and right brackets to the rack NetScreen 25 9 Chapter 2 Installing the Device 10 User s Guide Configuring the Device This chapter describes how to connect a NetScreen 25 device to your network and perform initial configuration on the device Topics in this chapter include Operational Modes on page 12 Transparent Mode on page 12 Route Mode on page 12 The NetScreen 25 Interfaces on page 13 Connecting the Device to a Network on page 14 Performing Initial Configuration Using the CLI on page 15 Connecting
21. s up Off link is down THE REAR PANEL The rear panel of the NetScreen 25 device contains the power outlet and ON OFF switch Power Outlet in A 0 OOA 01 0 00 E BAON ONA 00 0 0 0 00 ON OFF Switch You can order the NetScreen 25 device with either an AC or DC power supply NetScreen 25 5 Chapter 1 Overview 6 User s Guide Insta lling the Device This chapter describes how to install a NetScreen 25 device in an equipment rack or on a desktop Topics in this chapter include General Installation Guidelines on page 8 Equipment Rack Mounting on page 8 Equipment Rack Mounting on page 8 Equipment Rack Installation Guidelines on page 8 Equipment Rack Accessories and Required Tools on page 9 NetScreen 25 Rack Mount on page 9 Note For safety warnings and instructions please refer to the NetScreen Safety Guide The instructions in this guide warn you about situations that could cause bodily injury Before working on any equipment be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents NetScreen 25 7 Chapter 2 Installing the Device GENERAL INSTALLATION GUIDELINES Observing the following precautions can prevent injuries equipment failures and shutdowns Never assume that the device is disconnected from a power source Always check first Room temperature might not be su
22. tablishing remote console sessions using dialup connections through a 9600 bps RS 232 cable Dialing into the modem establishes the dialup console connection The table below lists the RJ 45 to DB 9 adapter connection definitions To employ a standard UART port both the console and the modem ports must use this configuration DB9 Signal Abbreviation DTE DCE RJ45 1 Data Carrier Detect DCD In Out NC 2 Received Data RD In Out 3 3 Transmitted Data TD Out In 6 4 Data Terminal Ready DTR Out In 7 5 Signal Ground SGND N A N A 4 6 Data Set Ready DSR In Out 2 7 Request To Send RTS Out In 8 8 Clear To Send CTS In Out 1 9 Ring Indicator RI In Out NC CompactFlash Card Slot The Compact Flash slot is for downloading or uploading system software or configurations This slot can accept a SanDisk CompactFlash card with a variety of memory capacities NetScreen has tested 96MB and 512MB cards The NetScreen device automatically detects the presence of a flash card and records the system log to it 4 User s Guide The Rear Panel Ethemet Interfaces Each Ethernet port is a 10 100 auto sensing interface Each port has a pair of LEDs the left LED indicates network traffic activity and the right LED indicates if the link is up the port is connected to an active device LEDs indicate the status of Network Traffic NetScreen LEDs Blinking link activity On link i
23. tant Performing the setup instructions below configures your device in Route mode To configure your device in Transparent mode see the NetScreen Concepts amp Examples ScreenOS Reference Guide 12 User s Guide The NetScreen 25 Interfaces THE NETSC REEN 25 INTERFACES Each NetScreen 25 device provides Ethernet interfaces for access and connectivity In addition there are logical non physical interfaces that perform special Layer 2 or management functions The configurable interfaces available on a NetScreen 25 device are as follows Interface Type Description Ethernet interfaces ethernetn specifies a physical ethernet interface denoted by a physical port n on the module Although each interface is bound to a security zone by default you can bind it to another zone as required ethernet1 Bound to the Trust security zone by default Connect this interface using a twisted pair cable with RJ45 connectors e ethernet2 Bound to the DMZ security zone by default Connect this interface using a twisted pair cable with RJ45 connectors ethernet3 Bound to the Untrust security zone by default Connect this interface using a twisted pair cable with RJ45 connectors ethernet4 Bound to the Null zone by default Layer 2 interfaces vlan1 specifies logical interface used for management and VPN traffic termination while the NetScreen device is in Transparent mode Tunnel interfaces tunnel n speci
24. te For safety warnings and instructions please refer to the NetScreen Safety Guide The instructions in this guide warn you about situations that could cause bodily injury Before working on any equipment be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents NetScreen 25 Chapter 1 Overview THE FRONT PANEL The front panel of the NetScreen 25 device has the following Power and status LEDs Asset Recovery pinhole for resetting the device to the original factory default settings A Console port for connecting to serial terminal emulation programs such as HyperTerminal A Modem port A Compact Flash card slot for storage of system images configuration files keys and logs Four Ethernet ports for connecting the NetScreen 25 device to your LAN or local workstations and to the Internet Power and Status LEDs Compact Flash Slot Ethernet Ports de Juniper NetScreen 25 Asset Recovery Pinhole Console Modem Power and Status LEDs The LEDs display up to date information about critical NetScreen 25 functions Status 1 LED Power LED Alarm LED Status 2 LED Flash LED Session LED 2 User s Guide The Front Panel The information revealed by each LED is as follows LED Name Purpose Status Meaning Power Power Status green Power is functioning correctly of
25. utes of idle time To change the timeout value execute the following command set console timeout number where number is the length of idle time in minutes before session termination To prevent automatic termination specify a value of zero Setting an IP Address for Managing the Device The default IP address for managing the NetScreen 25 device through the Trust zone interface Ethernet port 1 is 192 68 1 1 This is the IP address that you use to manage the device through a Telnet session or with the WebUI management application If you do not wish to use this default IP address you need to assign a new one To set the IP address of the NetScreen 25 Trust zone interface i Choose an unused IP address within the current address range of your Local Area Network Set the IP address of the Trust zone interface to this unused IP address by executing the following command set interface ethernetl ip ip_addr mask For example to set the IP address and subnet mask of the Trust zone interface to 10 100 2 183 and 16 respectively set interface ethernetl ip 10 100 2 183 16 To confirm the new port settings execute the following command get interface You should see that the IP address for the Trust zone interface is the IP address you set Connecting Using Telnet To establish a Telnet session with the NetScreen 25 device 1 Connect an RJ 45 cross over cable from the Trust zone interface Ethernet port 1 on the NetS
26. wo operational modes Transparent and Route The default mode is Route TransparentMode In Transparent mode the NetScreen 25 device operates as a Layer 2 bridge Because the device cannot translate the IP addresses of packets it cannot perform Network Address Translation NAT Consequently for the device to access the Internet any IP address in your trusted local networks must be routable and accessible from untrusted external networks In Transparent mode the IP addresses for the Trust and Untrust zones are 0 0 0 0 thus making the NetScreen device invisible to the network However the device can still perform firewall VPN and traffic management according to configured security policies Route Mode In Route mode the NetScreen 25 device operates at Layer 3 Because you can configure each interface using an IP address and subnet mask you can configure individual interfaces to perform NAT When the interface performs NAT services the device translates the source IP address of each outgoing packet into the IP address of the untrusted port It also replaces the source port number with a randomly generated value When the interface does not perform NAT services the source IP address and port number in each packet header remain unchanged Therefore to reach the Internet your local hosts must have routable IP addresses For more information on NAT see the NetScreen Concepts amp Examples ScreenOS Reference Guide Impor
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