Configure the router

Use the following commands to configure the router:

	root# cli
	root@>
	cli> configure
	[edit]
	root@# set system host-name olive.x83.net
	root@# set system domain-name x83.net
	root@# set interfaces fxp0 unit 0 family inet address 10.2.2.2/24
	root@# set system backup-router 10.2.2.1
	root@# set system name-server 10.2.2.1
	root@# set system root-authentication plain-text-password
	New password:
	Retype password:
	root@ show
	system {
	    host-name olive.x83.net;
	    domain-name x83.net;
	    backup-router 10.2.2.1;
	    root-authentication {
	         encrypted-password "$1$gNTKIVLL$nSw2LduQttCiGipspveEq."; ## SECRET-DATA
	    }
	    name-server {
	         10.2.2.1;
	}
	interfaces {
	    fxp0 {
	        unit 0 {
	            family inet {
	                address 10.2.2.2/24;
	            }
	        }
	    }
	}
	root@# commit
	root@olive.x83.net# exit
	root@olive.x83.net>

Other config params :

        root@olive.x83.net# set system ntp server  192.168.2.100
	root@olive.x83.net# set system time-zone Europe/Bucharest
	root@olive.x83.net# set system services ssh
	root@olive.x83.net# set interfaces lo0 unit 0 family inet address  10.200.200.1/32

root@olive.x83.net> configure  exclusive   //if several people login only you can use "configure"
root@olive.x83.net> status
root@olive.x83.net> request system logout user  john //kick someone out

The ””’show | display set””’ command is a handy way to reverse-engineer a router configuration when you are trying to duplicate portions of a configuration on many routers or when you need to write up configuration, monitoring, or troubleshooting procedures for your network operations staff. This command is especially useful if the configuration is complex and when setting it up involves many long commands and lots of typing.

Add comments

root@olive.x83.net# set area  0.0.0.0 interface fe-0/0/0
root@olive.x83.net# annotate area  0.0.0.0 "MESH routers"
root@olive.x83.net# show
	/* MESH routers */
	area 0.0.0.0 {
	     interface fe-0/0/0.0;
	}

To delete a comment, use the annotate command with an empty string:

root@olive.x83.net# annotate area  0.0.0.0 ""

Check syntax (commit)

After configuring issue ””’commit””’ command.

root@olive.x83.net# commit check 

If there are no errors you recieve : ”configuration check succeeds”

To debug commit :

root@olive.x83.net# commit | display detail

To exit from a lower level to operational mode : ””exit configuration-mode””

Backing up configuration

root@olive.x83.net# file copy /config/juniper.conf.gz  box:/root/tmp
root@olive.x83.net# save box:configMay
root@olive.x83.net# save  configMay                     //copy to a localfile
root@olive.x83.net# run file show  configMay         //to view it
root@olive.x83.net# run show system storage       // view diskspace

To backup every time you ””’commit””’:

root@olive.x83.net# set archival configuration transfer-on-commit
root@olive.x83.net# set archival configuration archive-sites ftp: //giany:password@box:/m40configs

Rollback

root@olive.x83.net# rollback 1   //loads other config
root@olive.x83.net# show
root@olive.x83.net# commit
root@olive.x83.net# rollback ?  //view rollbacks

View logs

root@olive.x83.net# run show log
root@olive.x83.net# run show log messages

Install different jinstall

root@olive.x83.net# request system software add validate box:jinstall-8.4R2.6-domestic-signed.tgz

Or copy the file to /var/tmp

root@olive.x83.net# file copy box:jinstall-8.4R2.6-domestic-signed.tgz /var/tmp
root@olive.x83.net# request system software add validate /var/tmp/jinstall-8.4R2.6-domestic-signed.tgz //and reboot here

and then reboot:

root@olive.x83.net# request system reboot

Gather system informations

root@olive.x83.net# show version
root@olive.x83.net# show version detail
root@olive.x83.net# show system processes
root@olive.x83.net# run show system processes | match /syslogd
root@olive.x83.net# run request support information
root@olive.x83.net# run file list detail /var/tmp //look for cores

root@olive.x83.net# run show system users 

 2:40PM  up 10:12, 1 user, load averages: 0.01, 0.06, 0.07
USER     TTY      FROM                              LOGIN@  IDLE WHAT
root     p1       10.2.2.1                         2:28PM      - cli 

root@olive.x83.net# run show system uptime
Current time: 2008-05-24 13:52:15 EEST
System booted: 2008-05-24 04:29:05 EEST (09:23:10 ago)
Protocols started: 2008-05-24 04:34:42 EEST (09:17:33 ago)
Last configured: 2008-05-24 13:38:28 EEST (00:13:47 ago) by root
 1:52PM  up 9:23, 1 user, load averages: 0.00, 0.02, 0.00

Accounts

root@olive.x83.net# set system login user giany full-name Giany
root@olive.x83.net# set system login user giany uid 1000
root@olive.x83.net# set system login user giany class super-user
root@olive.x83.net# set system login user giany authentication encrypted-password "$1$gNTKIVLL$nSw2LduQttCiGipspveE3."

root@olive.x83.net# set system login password password maximum-length 18   // max length
root@olive.x83.net# set system login password password minimum-length 8   // min lenght
root@olive.x83.net# set system login password password minimum-changes 3   // 3 case changes

Tacacs

To allow authentification of users :

root@olive.x83.net# set login user operations class super-user
root@olive.x83.net# set login user operations full-name “Operations Account”
root@olive.x83.net# set login user operations uid 9999
root@olive.x83.net# set system authentication-order [ tacplus password ];
root@olive.x83.net# set tacacs-server 10.2.2.1 secret aaaaa

SSH/Telnet Filter

You want to filter incoming ssh/telnet connections to a set of ips. First create a prefix-list with allowed ips then create a policer that will discard all incoming connections. After that create the policer that will allow your prefix-list. In the end create the filters for discard/accept and apply the filter to the specified interface.

set policy-options prefix-list telnet-ssh-sessions 10.2.2.1/32
set firewall policer 1m-bw-limit if-exceeding bandwidth-limit 1m
set firewall policer 1m-bw-limit if-exceeding burst-size-limit 15k
set firewall policer 1m-bw-limit then discard
set firewall policer 20m-bw-limit if-exceeding bandwidth-limit 20m
set firewall policer 20m-bw-limit if-exceeding burst-size-limit 1m
set firewall policer 20m-bw-limit then discard
set firewall filter re-filter term police-ssh from source-prefix-list telnet-ssh-sessions
set firewall filter re-filter term police-ssh from protocol tcp
set firewall filter re-filter term police-ssh from port ssh
set firewall filter re-filter term police-ssh from port telnet
set firewall filter re-filter term police-ssh from tcp-initial
set firewall filter re-filter term police-ssh then policer 1m-bw-limit
set firewall filter re-filter term police-ssh then accept
set firewall filter re-filter term ssh-telnet from source-prefix-list telnet-ssh-sessions
set firewall filter re-filter term ssh-telnet from protocol tcp
set firewall filter re-filter term ssh-telnet from port ssh
set firewall filter re-filter term ssh-telnet from port telnet
set firewall filter re-filter term ssh-telnet then policer 20m-bw-limit
set firewall filter re-filter term ssh-telnet then accept

set interfaces fxp0 unit 0 family inet filter input re-filter         //apply filter

Sending messages

request message all message "Log out immediately"
request system logout terminal p0
request system logout user giany
request message user giany message "Log out immediately"

Related posts:

1. Route servers