Cisco Switch Ssh und Telnet

Telnet aktivieren

• c3750#configure terminal
• c3750(config)#aaa new-model
• c3750(config)#username admin password 0 geheim
• c3750(config)#line vty 0 4
• c3750(config-line)#transport input telnet

SSH aktivieren

• c3750(config)#ip domain-name xinux.org
• c3750(config)#crypto key generate rsa

The name for the keys will be: c3750.xinux.org
Choose the size of the key modulus in the range of 360 to 2048 for your
  General Purpose Keys. Choosing a key modulus greater than 512 may take
  a few minutes.

How many bits in the modulus [512]: 
% Generating 512 bit RSA keys, keys will be non-exportable...[OK]

• c3750(config)#ip ssh time-out 60
• c3750(config)#ip ssh authentication-retries 2

ssh key löschen

• c3750(config)#crypto key zeroize

auto exec

• switch-rot(config)#aaa new-model
• switch-rot(config)#aaa authorization exec default local

Abschalten von telnet

• c3750#configure terminal

Enter configuration commands, one per line.  End with CNTL/Z.

• c3750(config)#line vty 0 4
• c3750(config-line)#transport input ssh

Wrap the key onto multiple lines

• root@rome:~# fold -b -w 72 ~/.ssh/id_rsa.pub

• c3750#configure terminal

Enter configuration commands, one per line.  End with CNTL/Z.

• c3750(config)#ip ssh pubkey-chain
• c3750(conf-ssh-pubkey)# username admin
• c3750(conf-ssh-pubkey-user)#

key-string
<< paste your multi-line public key here >>
exit

Change Default SSH Port

• c3750(config)# ip ssh port 2222 rotary 1
• c3750(config)# line vty 0 15
• c3750(config-line)# rotary 1