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What Secure Shell protocol does VanDyke Software recommend?

VanDyke believes that SSH2 is the current best choice protocol. Revised from the ground up, SSH2 has many architectural and practical improvements over SSH1, including addressing potential security flaws. The most immediate advantage to SSH2 is that port forwarding multiple channels is faster and more reliable. One channel can no longer consume all available bandwidth and slow other channels or sessions to a crawl, as in SSH1. SSH2 is also the protocol where new development effort at several companies is being focused, whether OS support for new platforms or in extending SSH2's capabilities. Security concerns specifically are best addressed in the SSH2 protocol.

Organizations that used SSH1 servers for licensing reasons now have a choice of alternative SSH2-based solutions. VanDyke Software offers VShell SSH2 servers for both Windows and popular UNIX platforms. The OpenSSH server project undertaken by OpenBSD developers also supports SSH2, and is available under a freeware license for OpenBSD and other UNIX / Linux operating systems.