Subject: Re: ssh - are you nuts?!?
To: None <firstname.lastname@example.org>
From: Jason R Thorpe <email@example.com>
Date: 12/17/2000 22:57:24
On Sun, Dec 17, 2000 at 07:29:24PM -0800, firstname.lastname@example.org wrote:
> > TCP tunnelling.
> How is TCP tunneling useful?
"TCP tunneling" is really not the correct term. It's actually
called "port forwarding", and could be used like this:
Assume that int.foo.com is the internal web server at
Foo, Inc. It's behind a firewall and is not accessible
from outside the company's internal network.
Foo, Inc. also provides a gateway for users on the road
(conferences, sales calls, etc.) to log into their systems
back at the office. Calls this ssh-gate.foo.com.
A user on the road can use SSH's port forwarding feature
to access the internal web server via the SSH gateway like
laptop% ssh -L8080:int.foo.com:80 ssh-gate.foo.com
Now on the user's laptop, he can point his web browser to
http://localhost:8080/ and get the company's internal
Needless to say, this is a Very useful feature.
-- Jason R. Thorpe <email@example.com>