Hacking Linux Exposed

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No web site is complete without a list of suggested links. We've included each and every link listed in Hacking Linux Exposed, as well as many others that you may find useful to help protect your system.

If you have suggestions, changes, or additions you'd like to see, write bri@hackinglinuxexposed.com.


Articles by HLE authors

Vendor Mailing Lists

Security Mailing Lists

  • SecurityFocus lists
    Bugtraq, Incidents, Vuln-dev, Focus-Linux, SF-News and many more.
  • LinuxSecurity.com
    Excellent weekly updates on Linux security.
  • Firewalls
    Original Firewalls mailing list, unmoderated
  • Firewall-Wizards
    Firewall mailing list, moderated by firewall guru Marcus Ranum.
  • Sans
    Sans weekly and monthly newsletters
  • Cert
    Cert Advisories
  • SAFER
    Security Alert for Enterprise Resources

Security and Hacking Websites

Sniffers

Security, Investigative, and Testing Tools/Suites

  • Nmap
    The best portscanning tool around
  • Lsof
    List Open Files shows open files, sockets, pipes, and more.
  • Snort
    Snort Intrusion Detection System

System Scanners

  • COPS
    The Computer Oracle and Password System, system vulnerability scanner.
  • Tiger
    TAMU's system vulnerability scanner

Network Scanners

  • SATAN
    Satan, the first public network scanner
  • SAINT
    Security Administrator's Integrated Network Tool -- An enhancement to Satan
  • SARA
    Security Auditor's Research Assistant -- our favorite Satan spinoff

  • Nessus
    client/server vulnerability scanner, updated continuously.
  • Toneloc modem war dialer

File Integrity Tools

Log Analysis Tools

  • Swatch
    Simple Watchdog, perl log analysis tool.
  • Logcheck
    A cron-style log analysis tool.
  • Logsurfer
    An advanced dynamic log analysis tool.

Port Scan Detectors

Encryption

  • PGP Freeware
    Pretty Good Privacy encryption software
  • GnuPG
    Fully open source PGP by the GNU project

  • OpenSSL
    OpenSSL (Secure Sockets Layer) libraries
  • Stunnel
    SSL Tunneling software, used to encrypt arbitrary cleartext protocols.

  • OpenSSH
    Secure replacements for the cleartext telnet, rlogin, rsh, rcp, and ftp protocols. Contains links to other SSH versions as well.
  • SSH FAQ

Enforcing Strong Passwords

Cracking Passwords

Password Cracking Dictonaries

Mail Servers

Preventing Spam

Web Servers and Dynamic Content

Linux Hardening Tools

  • Immunix
    Tools for preventing buffer overflows.
  • Bastille
    Linux hardening scripts.
  • Openwall Kernel Patches
    Linux kernel security patches by Solar Designer.
  • LIDS
    Linux Intrusion Detection System, kernel patch for extreemly advanced access controls.

Access Controls and Firewalls

Firewall Configuration Tools

Open Source Firewalls

Assorted Linux and Open Source links