Can ssh to hostname but not the ip

sumncguy · 11-09-2016, 09:08 AM

The subject line basically says it.

I am able to ssh to a network device using its hostname, but am unable to do so with the ip .. The ip is not in the private space.

I am using :

Quote:

ssh -q -o StrictHostKeyChecking=no $unam@$ip

Thanks for the help
sumncguy

smallpond · 11-09-2016, 10:16 AM

It sound like the digit keys on your keyboard are not working.

Of course there is the remote possibility that the actual error message that you are getting would be helpful, but you decided not to post that. Make sure you include '-v' in the ssh command. Also make sure you include the output of

Code:

host <hostname>

Turbocapitalist · 11-09-2016, 10:17 AM

Well, by turning off StrictHostKeyChecking, you are turning off the ability to verify that you are connecting to the right SSH server.

What error are you actually getting?

Does the host name resolve to the same IP number that you are trying directly?

sundialsvcs · 11-10-2016, 10:46 AM

Also, use a command such as (on Linux ...) dig hostname to request DNS-resolution of the name that you are using. It may well be that it is not the IP address that you think it is.

(Another easy way to do it, most of the time, is to use "ping." Notice which IP-address replies ...)

You do not need to use a hostname with ssh. In fact, I almost never do.

jefro · 11-10-2016, 03:19 PM

Host name could resolve from a number of sources also.

Wonder if the key and ip/name are somehow related or mapped?

sundialsvcs · 11-10-2016, 04:33 PM

Quote:

Originally Posted by jefro

Host name could resolve from a number of sources also.

Quite frankly, "it's always a bit of a mystery" just how (and by whom ...) a particular [non-existent ...] domain name might be resolved.

For example, in a recent project, I decided that, ("surely ...") the domain "blah-blah.cloud" must be available. Uh uh...

Little did I know that there are name servers in Czechoslovakia ...

jefro · 11-10-2016, 07:13 PM

I didn't really get OP's full topology on their problem so we are guessing.

I'd think that the dig command should have been a good first choice too.

Emerson · 11-10-2016, 07:51 PM

Quote:

Originally Posted by sundialsvcs

Quite frankly, "it's always a bit of a mystery" just how (and by whom ...) a particular [non-existent ...] domain name might be resolved.

For example, in a recent project, I decided that, ("surely ...") the domain "blah-blah.cloud" must be available. Uh uh...

Little did I know that there are name servers in Czechoslovakia ...

There is no Czechoslovakia ...

I told to a friend of mine how I used to have good time in Czech Republic when I was living in Europe. It was what ... 8 years ago? Now he is driving me nuts every time we meet asking if I miss my beer trips to Czechoslovakia ...