Server shut down by hacker ??

Hi, sorry if I am offtopic, but I am not sure why my co-located server shuts down abruptly. This is the second time, the first time it needed a file system check, and in the logs there was an entry that someone startet a X. auth (or so) ? I use Suse 7.2, kernel 2.4.7, proftpd 2.2.4rc2 (newest), apache 1.3.19, sendmail 9.1.2, sshd (prot 2 +1!!!) i alsouse a IDE RAID Controller from 3ware, which hasn't caused any trouble yet... Is this problem know to someone ? sorry, this is getting very annoying ;-( thanks so far. Gero ________________________________________________________________ Keine verlorenen Lotto-Quittungen, keine vergessenen Gewinne mehr! Beim WEB.DE Lottoservice: http://tippen2.web.de/?x=13