Probes if the remote host is running a http daemon, that supports the SSL CONNECT method, by requesting a connection to another host. If it succeeds, it prints out the version string of the HTTP server, if it is specified in the HTTP reply.

You may provide a match pattern which is matched against the banner of the remote service you told it to connect to. The pattern would be '220*' for a FTP service for example. It is used to verify the connection and to ensure that the proxy is working for sure. For more information on pattern, please read help\match.txt!
