4.15.5 Specifying the Telnet or Local proxy command

If you are using the Telnet proxy type, the usual command required by the firewall's Telnet server is connect, followed by a host name and a port number. If your proxy needs a different command, you can enter an alternative here.

If you are using the Local proxy type, the local command to run is specified here.

In this string, you can use \n to represent a new-line, \r to represent a carriage return, \t to represent a tab character, and \x followed by two hex digits to represent any other character. \\ is used to encode the \ character itself.

Also, the special strings %host and %port will be replaced by the host name and port number you want to connect to. The strings %user and %pass will be replaced by the proxy username and password you specify. The strings %proxyhost and %proxyport will be replaced by the host details specified on the Proxy panel, if any (this is most likely to be useful for the Local proxy type). To get a literal % sign, enter %%.

If a Telnet proxy server prompts for a username and password before commands can be sent, you can use a command such as:

%user\n%pass\nconnect %host %port\n

This will send your username and password as the first two lines to the proxy, followed by a command to connect to the desired host and port. Note that if you do not include the %user or %pass tokens in the Telnet command, then the ‘Username’ and ‘Password’ configuration fields will be ignored.