A neat way to hide your SSH port, but not very practical (scanners will just wait a little while to see if the SSH banner gets pumped out). You want something that speaks HTTP so it'll get through transparent proxies of corporations and wifi paywalls, which would be proxytunnel combined with a server-side configuration of whatever your favorite http proxy/server is. Even if your corporate environment forces NTLMv2 proxy authentication, you can chain cntlm and proxytunnel to their proxy and still tunnel out, and nobody is the wiser. (http://dag.wieers.com/howto/ssh-http-tunneling/)