Handling Step by Step: Unix Trojan Programs(paper)
Just an introduction.
Unix Security Handbook(faq)
Good and not
very old paper.
Administrator's Security Guide(book)
to bypass Solaris non-executable stack protection(paper)
Ops. I thought
non-exec is a coolest protection. Actually, it is not :(
mostly about applying patches.
Your Linux Box(paper)
Don't you know
it? You have to secure your Linux! ;-))).
Security to Common Linux Distributions(paper)
Nice and short
Linux, Part 2(paper)
Linux, Part 1(paper)
security for your Linux box
security Frequently Asked Questions (FAQ)(faq)
VERY old - 1997
Nice and alone
description about BSD security
with the Internet Daemons(paper)
of most know daemons and their ports
up sendmail on a firewall(paper)
Short Course on Systems Administration and Security Under Unix(book)
title - Short Course. Almost hand-book
holes manifest themselves in (broadly) four ways...(paper)
All about insecurities
- were and how to check
Ultimate Beginner's Guide To Hacking And Phreaking(paper)
I don't think
here is much about security but you can find a list of UNIX-types and their
password files locations
Backdoors into a UNIX computer(paper)
One more guide
Backdoors Through Firewalls(paper)
How to set
it and how to protect from it.
I do not know
if you will use all those advices but some of them are helpful