- FindVPN
 - Includes a directory of companies offering VPNs, news, guides, and articles. - Network World Fusion: VPN Research Center
- Offers in-depth coverage of VPN issues including breaking news on Wi-Fi, security, WAN technologies, intrusion prevention systems, white papers, book reviews, and training resources.
- Virtual Private Network Consortium (VPNC)
- Industry trade association for VPN vendors.
- VPNcon
- Contains information on VPNs including conventions and exhibitions.
- VPNlabs
- Offers research, reviews, and a discussion forum for Virtual Private Networks. Also tests VPN software, hardware, and services.
- Web Directory: VPN Information
- Links to reviews, cryptographic information, how-tos, and more.
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