From the OpenSSH's ssh_config(5) manpage, the
DynamicForward keyword (and associated command-line switch
Specifies that a TCP port on the local machine be forwarded over the secure channel, and the application protocol is then used to determine where to connect to from the remote machine. ... Currently the SOCKS4 and SOCKS5 protocols are supported, and ssh(1) will act as a SOCKS server.
What can we do with this? ...more