{OpenConnect is a client for Cisco's AnyConnect SSL VPN,} which is supported by the ASA5500 Series, by IOS 12.4(9)T or later on Cisco SR500, 870, 880, 1800, 2800, 3800, 7200 Series and Cisco 7301 Routers, and probably others.

WWW: http://www.infradead.org/openconnect/
