[LUNI] swimming upstream on SSH or VPN

[Seva Epsteyn]

     -R [bind_address:]port:host:hostport
             Specifies that the given port on the remote (server) host is to
             be forwarded to the given host and port on the local side.  This
             works by allocating a socket to listen to port on the remote
             side, and whenever a connection is made to this port, the connec-
             tion is forwarded over the secure channel, and a connection is
             made to host port hostport from the local machine.

             Port forwardings can also be specified in the configuration file.
             Privileged ports can be forwarded only when logging in as root on
             the remote machine.  IPv6 addresses can be specified by enclosing
             the address in square braces or using an alternative syntax:
             [bind_address/]host/port/hostport.

             By default, the listening socket on the server will be bound to
             the loopback interface only.  This may be overriden by specifying
             a bind_address.  An empty bind_address, or the address '*', indi-
             cates that the remote socket should listen on all interfaces.
             Specifying a remote bind_address will only succeed if the
             server's GatewayPorts option is enabled (see sshd_config(5)).

You may also need:

     -g      Allows remote hosts to connect to local forwarded ports.

-Seva

On Fri, 14 Mar 2008, Jay Strauss wrote:

> Hi,
> 
> Is there any way to use an SSH tunnel from the destination?  That is,
> if I'm on "A" and ssh to "B", is there a way once the tunnel has been
> established, that B could use the tunnel for its own purposes (such as
> doing a VNC of A)?
> 
> Thanks
> Jay
>