full-disclosure - Re: sshd logins without a source

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Message-Id: <201109230942.p8N9gqAf021712@bari.maths.usyd.edu.au>
Date: Fri, 23 Sep 2011 19:42:52 +1000
From: paul.szabo@...ney.edu.au
To: full-disclosure@...ts.grok.org.uk, lists@...ckhat.bz
Subject: Re: sshd logins without a source

> ... I can see in each servers sshd logs an entry like the following:
> Sep 22 12:57:14 test-vm sshd[25002]: pam_unix(sshd:session): session opened for user root by (uid=0)
> Sep 22 12:57:32 test-vm sshd[25002]: pam_unix(sshd:session): session closed for user root
> ... seems odd that there is no IP address corresponding with the
> login, I can't seem to reproduce that on my test servers.

I do not think that sshd normally logs its source. What do you mean that
you cannot reproduce? - To produce the desired log, I added to
/etc/hosts.allow the line
sshd : all : spawn /usr/bin/logger -t"%d[%p]" "Connection source %h port %r"

Cheers, Paul

Paul Szabo   psz@...hs.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
School of Mathematics and Statistics   University of Sydney    Australia

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