haproxy can kind-of do this as well: "support for inspecting HTTP contents in TCP frontends and switching to HTTP backends (allowing HTTP+SSL to coexist on the

haproxy can kind-of do this as well: "support for inspecting HTTP contents in TCP frontends and switching to HTTP backends (allowing HTTP+SSL to coexist on the same port)." It should be possible (and not too difficult) to support non-HTTP protocols switching on the same front end port.