+You can also specify an IP address to listen on. Typically a
+Windows machine can be asked to listen on any single IP address in
+the \cw{127.*.*.*} range, and all of these are loopback addresses
+available only to the local machine. So if you forward (for
+example) \c{127.0.0.5:79} to a remote machine's \cw{finger} port,
+then you should be able to run commands such as \c{finger
+fred@127.0.0.5}. This can be useful if the program connecting to
+the forwarded port doesn't allow you to change the port number it
+uses. This feature is available for local-to-remote forwarded
+ports; SSH1 is unable to support it for remote-to-local ports,
+while SSH2 can support it in theory but servers will not
+necessarily cooperate.
+