full-disclosure - Re: sshd logins without a source

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4E7C569B.9000902@oneechan.org>
Date: Fri, 23 Sep 2011 04:51:23 -0500
From: Laurelai <laurelai@...echan.org>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: sshd logins without a source

On 9/23/2011 4:42 AM, paul.szabo@...ney.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@...hs.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
> School of Mathematics and Statistics   University of Sydney    Australia
>
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
> Hosted and sponsored by Secunia - http://secunia.com/
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.

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/