Configure SSH on a Cisco router in less than 30 seconds!

Secure shell popularly known as SSH
is a TCP application on port 22 that is used to access a router through the vty
line. SSH just like Telnet allows a network engineer/administrator to
administer a router from a remote location. The major difference between SSH
and Telnet is in the security that the former provides over the latter. SSH
provides an encryption mechanism that ensures that the communication between
your computer and the router is encrypted unlike telnet. To enable telnet on a
Cisco K9 router, simply do the follows, highlighted in texts and in the video
below.

>>
router(config)#hostname timigate –give the
router a hostname. It”s a must if ssh is to be enabled
>>timigate(config)#ip domain-name
yourdomain.com 
>>timigate(config)#cypto key generate
rsa —- hit the enter key and enter the modulus key in increment of 512. Lowest is
512. The higher the number, the better but consider the router’s processor. For
me, I will use 1024
>>timigate(config)#ip ssh au 3 — the
number of wrong passwords you can enter before you start over. It is used to
guard against brute force attacks.
>>timigate(config)#ip ssh time 30 —maximum
length of idle time allowed before you are logged off the router.
>>timigate(config)#username timigate
password cisco
>>timigate(config)#enebale secrete
cisco
>>timigate(config)#line vty 0 4
>>timigate(config-line)#login local 
>>timigate(config-line)#transport
input ssh 
See
the video below for visual demonstration of how to set up ssh. 
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Ashioma Michael, a BSc (Computer Science)., MTCNA, CCNA, and CCNP holder with many years of industry-proven experience in network design, implementation and optimization. He has tutored and guided many professionals towards obtaining their Cisco certifications. Mike works as a senior network engineer with one of the leading internet service providers in West Africa.

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