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What can be done to protect my systems?
Don't run as root!
Implement a security posture (not just a firewall)
Monitor for new vulnerabilities / exploits and fixes
- Distro website
- Mailing lists
- Security sites
Notes:
RFC 1636 - Crunchy outside, soft and chewy inside... "i.e., firewalls foster a false sense of security, leading to lax security within the firewall perimeter."
Tripwire / AIDE / LIDS
snort / portsentry
Stackguard - http://immunix.org/
Don't forget to watch for application updates!!!