SSH, The Secure Shell: The Definitive Guide, 2nd Edition

Port Forwarding

Port forwarding allows Tectia to tunnel TCP connections through multiplexed channels within an existing SSH connection. [9.2] To set up forwarding, use the Tunneling page (Figure 16-7) of the Settings dialog which is accessed by either the Settings toolbar icon or the Edit/Settings menu item. Local and remote forwarding (specified by the -L and -R options for the ssh2 command-line client) correspond to outgoing and incoming tunnels, respectively, for the GUI client.

Figure 16-7. Tunneling page

Configure forwarding by first selecting the Outgoing or Incoming tab. Click Add to define settings for a new port forwarding, using a separate dialog (Figure 16-8), or click Edit to redefine settings for a selected existing forwarding, using a similar dialog. Click Remove to destroy a selected forwarding.

Figure 16-8. Defining settings for a new port forwarding

Settings for each forwarding include:

• A descriptive name, for the displayed list

• The port on which to listen, either on the client side (for local forwarding or outgoing connections) or on the server side (for remote forwarding or incoming connections)

• The destination host and port, to which connections should be forwarded on the opposite side

• A checkbox to allow only local connections (only for local forwarding or outgoing connections), ...