Wednesday, 4 May 2011

Configuring SSH on Cisco Router


SSH Configuration:

RX1(config)#int f0/0
RX1(config-if)#ip address 10.1.1.1 255.0.0.0
RX1(config-if)#no shut
RX1(config-if)#exit
RX1(config)#ip domain-name networkexpert.co.in
RX1(config)#crypto key generate rsa general-keys modulus 1024
The name for the keys will be: RX1.networkexpert.co.in

% The key modulus size is 1024 bits
% Generating 1024 bit RSA keys, keys will be non-exportable...[OK]

RX1(config)#
*Mar  1 04:06:34.874: %SSH-5-ENABLED: SSH 1.99 has been enabled
RX1(config)#username netx password netx
RX1(config)#line vty 0 4
RX1(config-line)#login local
RX1(config-line)#transport input ssh

RX1(config-line)#exit

SSH from a Router to RX1:
RX3(config)#int f0/0
RX3(config-if)#ip address 10.1.1.2 255.0.0.0
RX3(config-if)#no shut
RX3(config-if)#end
RX3#ssh -l netx 10.1.1.1
Password:*****
RX1>enable
Password:*****
RX1#exit

[Connection to 10.1.1.1 closed by foreign host]
RX3#

Link:
Configuring Secure Shell on Routers and Switches Running Cisco IOS 

3 comments:

  1. ! to show ssh connections
    #sh ip ssh

    -OP-
    SSH Enabled - version 1.99 // SSH Ver 1 and 2 enabled

    SSH Enabled - version 2.0 // Only version 2 enabled
    // #()no ip ssh version 1 (Before Generating RSA keys)

    SSH Enabled - version 1.5 // Only version 1 enabled RSA key lower than 768 more than 360

    ! to show rsa crypto keys
    #sh crypto key mypubkey rsa

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