AIX 4.3 Network Hardening  
   Recipes to secure network services on AIX. Download of scripts available.
   http://ist.uwaterloo.ca/security/howto/2001-01-15/

Absence of Malice  
   Editorial from Dr. Dobb's Journal about Randal Schwartz's felony convictions for running Crack on unauthorized machines.
   http://www.lightlink.com/fors/press/ddj9603.html

Raw IP Networking FAQ  
   Thamer Al-Herbish's Raw IP Networking FAQ about networking below TCP/UDP and sniffing networks. Includes raw socket source code.
   http://www.whitefang.com/rin/

TPEP Frequently Asked Questions  
   The Computer Security Evaluation Frequently Asked Questions (V2.1)
   http://www.radium.ncsc.mil/tpep/process/faq.html

Unix security basics, Part 1  
   Understanding file attribute bits and modes
   http://www.itworld.com/Comp/3380/swol-1020-unix101/

Secure UNIX Programming FAQ  
   Definitions of security holes, security principles, how to access files safely, and untainting input.
   http://www.whitefang.com/sup

FreeBSD Security How-To  
   Securing networking and kernel services.
   http://people.freebsd.org/~jkb/howto.html

Secure Programming for Linux and Unix HOWTO  
   Online book on software security tips.
   http://www.linuxdoc.org/HOWTO/Secure-Programs-HOWTO/

NIST Computer Security Resource Clearinghouse  
   Collects and disseminates computer security information and resources to help users, systems administrators, managers, and security professionals better protect their data and systems.
   http://csrc.ncsl.nist.gov/

Coping with the Threat of Computer Security Incidents  
   A primer from prevention through recovery by Russell L. Brand.
   ftp://ftp.cerias.purdue.edu/pub/doc/guidelines/primer.txt

Unix Security  
   Paper by Rajib K. Mitra about file permissions, daemons, stack overflows and scripts.
   http://www.spy.net/~jeeb/unix.html

Securing Debian HOWTO  
   Protecting Debian during installation and securing network services.
   http://www.debian.org/doc/manuals/securing-debian-howto/

G A C T - Unix Passwords  
   To get to "ROOT" you have to have somewhere to start. For the purposes of this file, that somewhere is with the 'passwd' file.
   http://www.geocities.com/gactnet/computers/unixpasswd.html

Quick and Dirty Home Unix Security, Part I  
   Mandrake installation security pointers.
   http://unixpunx.org/modules.php?op=modload&name=News&file=article&sid=40&mode=thread&order=0&thold=0

Admin's Choice - Resources for Unix administrators  
   Solaris system administration FAQs, articles and tips.
   http://www.adminschoice.com/docs/P_securing_solaris.htm

Adminschoice - Securing solaris OS  
   Details some of the focus areas for security and provides suggestions to make it strong.
   http://adminschoice.com/docs/securing_solaris.htm

Writing Safe Setuid Programs  
   Collection of papers on writing safe setuid programs by Matt Bishop.
   http://nob.cs.ucdavis.edu/~bishop/secprog/index.html

Auditing UNIX Systems: A Case Study  
   This report, written as a case study, presents results of a detailed information security audit of UNIX systems that belong to a fictitious company. It illustrates an approach to performing such an examination.
   http://www.zeltser.com/auditing-unix-systems/