Hi,
Thanks to everyone for contributing several tips. I am looking forward
to a highly educating weekend :) Here is a summary of packages that were
suggested in the various replies:
aide: Advanced Intrusion Detection Environment - static binary
bastille: Security hardening tool
chkrootkit: Checks for signs of rootkits on the local system
denyhosts: an utility to help sys admins thwart ssh hackers
fail2ban: bans IPs that cause multiple authentication errors
harden: Makes your system hardened
iftop: displays bandwidth usage information on an network interface
iptraf: Interactive Colorful IP LAN Monitor
logcheck: mails anomalies in the system logfiles to the administrator
ntop: display network usage in top-like format
rkhunter: rootkit, backdoor, sniffer and exploit scanner
tiger: Report system security vulnerabilities
tripwire: file and directory integrity checker
Thanks
Raj Kiran
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