How to configure sshd to automatically do port forwarding

[Fran Garcia]

On Thu, Jun 23, 2011 at 23:19, Allen, Jack <Jack.Allen at mckesson.com> wrote:
> Hello:
>
>        I have an Application needs to connect to other systems, login
> run an Application and then transfer data to the other Application. This
> has been working via a program I wrote years ago called ptsd (Pseudo
> Terminal Server). Basically the ptsd program listens on a local port
> (127.0.0.1 20000). The Application open a connection to it and then ptsd
> prompts for some information and then makes a telnet connection to the
> other system and then just becomes a pipe, but handling the telnet
> protocol on one side of it.

You can accomplish this using a config file in the _client_ host, ie:

user at client ~ #  cat .ssh/config
Host remotehost
Localforward 20000  localhost:20000

# ssh remotehost
(connect to port 20000 on clienthost and your connections will be crypted :-))

HTH