About.com VPN directory
A smattering of VPN resources including a glossary and a self-test.
Corecom VPN FAQ Page
Geared towards those new to VPN.
Find VPN
Directory of VPN providers, articles, and links.
How Stuff Works: How Virtual Private Networks Work
Gives definition of VPN and an overview of general VPN topics, includes diagrams and an animation.
InfoSysSec
Comprehensive collection of VPN guides, FAQs, tutorials and articles. Vendors and products; usage with Linux, NT and Unix; integration with firewalls, and mailing lists.
NW Fusion: Research: VPNs
This is a comprehensive collection of VPN resources and articles.
Tom Dunigan's Virtual Private Networks page
This page describes IP-based VPN technology over the Internet
Virtual Private Network Consortium
VPNC is the international trade association for manufacturers in the VPN market.
VPN Info on the World Wide Web
All-encompasing guide to VPN. Includes standards, reviews, legal information, and howtos.
VPN labs - research community
VPN labs is an open community for researching, reviewing, and discussing Virtual Private Networks.
