[ILUG] SSH

[Vincent Cunniffe]

Jon. wrote:

> Hey,
> 
> There is a machine behind a firewall, this user has asked me to connect 
> to this machine however its stuck behind a firewall. This user can 
> however ssh out to a machine i use on the internet. Is it possible to 
> setup that he ssh at myhost and from that i can somehow tunnel back to his 
> machine thats behind the firewall through the ssh session that he has 
> started??

Yes.

SSH can connect to an external machine, and providing it's a valid user 
there, can open a port on the external machine which will tunnel back 
down the connect and onto a port on his machine behind the firewall.

SSH manpage has the details iirc.

Vin