Evaggelos Balaskas - System Engineer

Permit ssh access to your cisco router only from your internal lan

If your internal lan is: 192.168.0.0/27

First create a new access-list:

access-list 123 permit ip 192.168.0.0 0.0.0.31 any

and then add this to your line configuration:

access-class 103 in

If you want more help:

€ ssh ROUTER_IP
 password: 

router>en
Password: 

router#conf t 
Enter configuration commands, one per line.  End with CNTL/Z.

router(config)# access-list 123 permit ip 192.168.0.0 0.0.0.31 any

router(config)# line vty 0 4
router(config-line)# access-class 103 in
router(config-line)# end

router# write mem

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