банальная проверка на дыры

Description: Report system security vulnerabilities
 TIGER, or the 'tiger' scripts, is a set of Bourne shell
 scripts, C programs and data files which are used to perform
 a security audit of UNIX systems.  TIGER has one primary goal:
 report ways 'root' can be compromised.
 .
 Debian's TIGER incorporates new checks primarily oriented towards
 Debian distribution including: md5sums checks of installed files,
 location of files not belonging to packages, check of security
 advisories and analysis of local listening processes.

Description: Remote network security auditor, the server
 The Nessus Security Scanner is a security auditing tool. It makes
 possible to test security modules in an attempt to find vulnerable
 spots that should be fixed.
 .
 It is made up of two parts: a server, and a client. The server/daemon,
 nessusd, is in charge of the attacks, whereas the client, nessus,
 provides the user a nice X11/GTK+ interface.

http://www.leader.ru/secure/who.html