Kerberos: The Network Authentication Protocol - Reference distribution and official documentation for Kerberos. Software is subject to US export control. (MIT)

Cybersafe Ltd - Provides products for database security, web security, and security infrastructure based on the Kerberos protocol, and also provides Kerberos consulting and support.

GNU Shishi - Freely available implementation of Kerberos 5. Includes system documentation and downloads.

Heimdal - An international free implementation. Includes downloads, distribution information and mailing list contacts.

How to Kerberize your Site - Excellent tutorial on implementation. Contains detailed steps to follow for a successful installation, as well as answers to common questions.

Kerberos: An Authentication Service for Computer Networks - A technical paper documenting the system and standard. Includes diagrams and references.

Kerberos FAQ - Answers to frequently asked questions.

Kerberos Network Authentication Service - A resource site with documentation, papers and software distributions. Software may be subject to US export control.

Kerberos Reference Page - An index of related resources. Includes software distributions and patches, as well as user documentation.

MIT Kerberos Consortium - Created to establish Kerberos as a universal authentication platform for the world's computer networks. Includes news and events, details of sponsors and those involved, and membership information.

Notes on Integrating Windows, RedHat, and HPUX Using Kerberos - Brief tutorial on configuring *nix systems to authenticate off a Microsoft Active Directory server.

RFC 1510 - An overview and specification of the official internet protocol.

CERT Advisory: Buffer Overflow in Kerberos Administration Daemon - "Multiple Kerberos distributions contain a remotely exploitable buffer overflow in the Kerberos administration daemon. A remote attacker could exploit this vulnerability to gain root privileges on a vulnerable system." (October 28, 2002)