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Can’t Login to Your ASA via SSH or Telnet?

I deployed a Cisco ASA at a location and couldn’t get logged in via SSH. I would get prompted, but, no matter what username/password I put in, it would just reject me. After some digging, it turns out that I forgot this command.

aaa authentication ssh console LOCAL

When I put this in, it let me right in as expected. I have no clue what the deal was. I guess I assumed that the ASA would use the local userbase if a AAA service wasn’t configured. I guessed wrong.

I’m sure this will apply to telnet sessions as well. I’d also bet money that equivalent PIX OS versions do that same, so keep an eye out.

7 thoughts on “Can’t Login to Your ASA via SSH or Telnet?

  1. This is normal and logical behavior. If you don’t put any aaa statement in your config console (and telnet) only ask for password and not the username. This is the “global” password not the password associated with a user. In case of http (asdm) you can leave the username empty and only provide the enable password. In case of ssh the username is mandatory so ASA/PIX require you to use the special (“magic”) username “pix”. This is documented by Cisco.

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