- Bastille Linux - http://www.bastille-linux.org/
Attempts to "harden" (tighten the configuration of) a Red Hat or Mandrake Linux installation.
- Linux Security - http://www.linuxsecurity.com/
Information collected from many sources: feature articles, advisories, news, documentation, forums, links.
- Linux Security - http://www.Linux-Sec.net
Linux Security, server hardening, 1U server, 24x7 server admin, monitoring, IDS, NDS, firewalls
- Dranch: TrinityOS - http://www.ecst.csuchico.edu/~dranch/LINUX/index-linux.html
Step by step, example driven, HOWTO on building a Linux box with an aim towards strong security. Also, links to resources and mailing lists.
- Hacking Linux Exposed - http://www.hackinglinuxexposed.com/
Companion Website to Hacking Linux Exposed, Osborne/McGraw-Hill. Source code from the book, updates, and other tools to secure your Linux system.
- Linux Audit and Intrusion Detection - http://www.intersectalliance.com/projects/Snare/index.html
InterSect Alliance are the creators of the SNARE Linux C2-style Audit module, and have a consulting background in advanced audit analysis, intrusion detection systems, and forensics for Unix and other operating systems.
- Penetrator Megablaster - http://www.angelfire.com/linux/borisl/MegaBlaster.html
A kernel module that detects and stops overflow attacks, like Linux Buffer Overflow attack security, which aim to get an interactive access to the system.
- New Security Features in Linux 2.4 - http://www.linuxsecurity.com/feature_stories/kernel-24-security.html
Selective privileges (capabilities), cryptography, random number devices.
- Linuxbroker - Security - http://security.linuxbroker.com
Linuxbroker provides all types of resources you need like Linux newsgroups search engine, daily news, howtos, applications releases tracking and security alerts.
- Sardonix.org - https://www.sardonix.org/
DARPA-funded community project to audit the source of all Linux applications for security vulnerabilities.
- NiftyBox Advisor - http://www.niftybox.com/
Open-source security tools including "Advisor" to automatically notify an admin when a security advisory affects an installed package.
- Password Management System - http://passwordms.sourceforge.net/
Designed for System Administrators, to handle user logins for several computers running Linux. It works with a console interface, based on the CDK library that uses ncurses. Import data from csv files and export to text files with a free definable format.
- The Digital Underground - http://shoktek.com/du/
Computer and Technology articles, and a members page for the "digital underground" community with text, programs, and security information.
- SSH, the Secure Shell: The Definitive Guide - http://www.snailbook.com
This is a companion website for "SSH: The Secure Shell The Definitive Guide" by Daniel Barrett and Richard Silverman (O'Reilly, 2003). It contains technical details on the SSH as well as sample book material.
- LinuxSecure - http://www.linuxsecure.de
This site on Linux and security covers firewalls (iptables), intrusion detection systems (snort), securing services, and Linux security in general. The aim is to provide information about protection, detection, and reaction with respect to attacks.
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