Changed IP Address, Login Pause

[rob_mazur]

SuSE 9.1
I had to change my ip address on my box. Now when I shell into it I
get about a 30 second pause between when I send "ssh
myu...@xxx.xxx.xxx.xxx" and the time I am prompted for a password.
But I eventually gain a successful login. Otherwise everything else
about the box is fine (for example, it runs Apache and requests to it
respond instantly).

This happens when trying to login in from any machine....even a
machine I have never logged into this box from. I figure this has to
do with some identifying key on the SuSE box. But I can't think of
what?

Can anyone give me an idea of what to look for?

Thanks,
Rob

[Jeffrey H. Coffield]

I've seen this with FTP, but not SSH so it's a guess. Are the name
servers working?

Jeff

[Moe Trin]

On Wed, 10 Jun 2009, in the Usenet newsgroup alt.os.linux.suse, in article
<bb5a47d5-1a2a-41fd...@j20g2000vbp.googlegroups.com>, rob_mazur
wrote:

NOTE: Posting from groups.google.com (or some web-forums) dramatically
reduces the chance of your post being seen. Find a real news server.

>I had to change my ip address on my box. Now when I shell into it I
>get about a 30 second pause between when I send "ssh

FAQ!!! Fix your DNS (or the hosts file on the server).

>This happens when trying to login in from any machine....even a
>machine I have never logged into this box from. I figure this has
>to do with some identifying key on the SuSE box. But I can't think
>of what?

The daemon on the system you try to log in _TO_ is trying to fill in
the logs properly - "who is this idiot who is connecting to me?"
Well, it knows the IP address, so it tries to ask the C library code
in the kernel to translate this IP address to a Fully Qualified Domain
Name (FQDN) which is translated to mean a hostname with dots. "foo"
isn't the FQDN - we're looking for 'foo.bar.baz.qux.example.com'

Two solutions: Fix the DNS - the PTR record for "this" IP address
must translate to a FQDN. The other solution is to put an entry
in the hosts file on the server that has the IP and FQDN.

>Can anyone give me an idea of what to look for?

That search engine you are posting from can. Did you try using that?

Results 1 - 10 of about 2,240,000 for long pause login Linux. (0.22
seconds)

Didn't think so.

Old guy