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Re: Yet anothe r"have i been hacked" alert



On Fri, May 16, 2003 at 02:30:09PM +0200, Andreas Vitz remarked:
> Hi there,
> I'm knew to the program called logchecker and today i got
> following message:
> 
> kai-router 2003/05/15 23:02 ACTIVE SYSTEM ATTACK!
> 
> Cleaned rules files exist in /var/lib/logcheck/cleaned
> directory that cannot be removed. This may be an attempt to
> spoof the log checker.
> 
> i don't understand what this  message means. and i dont fing
> good how-to's, documentations or stuff like this about
> warnings caused by logcheck
> 
> 
> 
> 
> there are some other suspicious (to me) log entries:
> 
> May 15 09:25:46 kai-router pppoe[180]: Bogus PPPoE length field (1262)
> May 15 09:27:25 kai-router pppoe[180]: Bogus PPPoE length field (111)
> May 15 09:27:33 kai-router pppoe[180]: Bogus PPPoE length field (111)
> May 15 09:27:33 kai-router pppoe[180]: Bogus PPPoE length field (48)
> May 15 09:27:33 kai-router pppoe[180]: Bogus PPPoE length field (111)
> May 15 09:27:33 kai-router pppoe[180]: Bogus PPPoE length field (48)
> May 15 09:28:37 kai-router pppoe[180]: Bogus PPPoE length field (111)
> May 15 09:28:39 kai-router pppoe[180]: Bogus PPPoE length field (111)
> May 15 09:29:42 kai-router pppoe[180]: Bogus PPPoE length field (50)
> May 15 09:36:45 kai-router pppoe[180]: Bogus PPPoE length field (623)
> May 15 09:36:48 kai-router pppoe[180]: Bogus PPPoE length field (111)
> May 15 09:37:07 kai-router pppoe[180]: Bogus PPPoE length field (111)
> May 15 09:47:18 kai-router pppoe[180]: Bogus PPPoE length field (172)
> 
> i get them day by day, since a week or so. 
> 
> I use a adsl connection.
> 
> 
> so my final question "have i been hacked" ???
> 
> yours
> 
> Andreas Vitz

Run chkrootkit (as root) and see if there are any signs of
tampering.

Cheers,
Raymond

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