Microsoft's ISA successor with SSL-VPN
Today, Microsoft enters the market for SSL VPN solutions with its Intelligent Application Gateway (IAG) 2007. The further development of the Internet Security and Acceleration (ISA) Server contains this VPN solution from Whale Communications, which was taken over by Microsoft in 2006.
SSL VPNs offer field workers and telecommuters encrypted, authenticated access to enterprise networks via browsers. An https connection authenticated on both sides serves as the basis, providing external parties with relatively easy, secure access to resources that can be adapted to a web interface -- other than websites this could be the user's e-mail inbox, for example.
Unlike with complete VPN solutions such as IPSec or OpenVPN, which is based on Secure Socket Layers too, services of all kinds cannot be channeled so easily through the virtual tunnels of such browser-based VPNs. Microsoft's partners Celestix Networks and Network Engines will be manufacturing IAG 2007 as a pre-configured appliance and selling it via a network of resellers.