Full Disclosure: Re: sshd logins without a source

[Laurelai <laurelai () oneechan org>]

On 9/23/2011 4:42 AM, paul.szabo () sydney edu au wrote:
> > ... 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 () maths usyd edu au   http://www.maths.usyd.edu.au/u/psz/
> School of Mathematics and Statistics   University of Sydney    Australia
>
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Don't most modern Linux distros log sshd by default? If for whatever
reason yours doesn't you can set the log level in the sshd config.

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