Basics of Linux Security
Linux for Engineering and IT Applications
Linux Security by Bob Toxen
- detailed explanations and excellent security tips;
Linux Firewalls (2nd edition)
by Robert Ziegler - comprehensieve guide on iptables;
Linux Security Cookbook
by Daniel Barrett, Richard Silverman and Robert Byrnes - great HOWTOs on security topics;
Advanced Linux Networking
by Roderick Smith - nice introduction to the concepts of various network applications.
Smashing The Stack For Fun and Profit, by Aleph One.
-- a classical tutorial on writing buffer overflow applications.
Computer Emergency Responce Team (CERT).
-- Current security advisories.
-- Recent articles related systems security.
-- annual hacker's magazine.
Linux Kernel Rootkits
, by Rainer Wichmann -- nice overview of the Linux Kernel rootkits and their detection tools.
- a security hardening program for Linux.
How systems get compromised
Package upgrades and verification
Open Ports List
Closing Ports List
IP filtering firewalls (iptables)
Building iptables rules
Simple iptables script
Exercises with iptables
GNU Privacy Guard
System Integrity checks
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