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Date: Tue, 19 Aug 2008 14:12:02 +0200
From: "Michael Grant" <mgrant@grant.org>
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Subject: Re: getting pam to put the ip address in the log
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On Tue, Aug 19, 2008 at 2:02 PM, Michael Grant <mgrant@grant.org> wrote:

> Recently I have been seeing lots of connections to my sshd trying to guess
> passwords.  One thing I noticed was the hostname reported in the auth.log
> without reverse dns.  sshd never puts in the ip address, this is all I see:
>
> sshd[14450]: error: PAM: authentication error for illegal user access from
> host1.xxx.br
>
> Is it possible to get pam or sshd or whatever is ultimatly logging this to
> put the ip address in the log so I can see where this is really coming from?
>
> Michael Grant
>

Ths seems to work:

Put this in /etc/ssh/sshd_config:

UseDNS no