Why are we need set ip domain in the configuration the ssh ?

[eduangelo]

Am I can configurate ssh whithout set ip domain name?

Which is importanting the ip domain name in the configuration the ssh?

[luis_cordova · Accepted solution]

Hi @eduangel,

This is because the rsa key name is composed by host name and domain name, and since ssh needs an rsa key in order to work, we need to specifiy a domain name before configuring the rsa key.

Regards

[Francesco Molino · Accepted solution]

Hi

By default on Cisco IOS, when generation rsa keys, it names it using hostname+domain-name.

If you add the keyword LABEL xxxx (where xxxx corresponds to a name you want), you'll see you won't get any error message anymore.

[Karsten Iwen · Accepted solution]

Francesco already answered your question. For some more info on this topic, I have written a little document:

Guide to better SSH-Security