*BSD News Article 99289


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From: eduros@chouette.inria.fr (Emmanuel Duros)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: How to use a tunnel interface?
Date: 9 Jul 1997 12:26:34 GMT
Organization: I.N.R.I.A. , Valbonne Sophia Antipolis
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I have been trying to undestand how to use a tunnel interface but
I have not had much success!

I just want to send packets that would be tunneled via the interface
tun0. 

According to me, the configuration could be as follow.

On my station, I create a tunnel:

$ ifconfig tun0 138.96.152.64 138.96.152.20
(138.96.152.64 is my local IP address)

Then I had a route to the tunnel:

$ route add 138.96.100.100 138.96.152.20

As I ping host 138.96.100.100 and check (tcpdump -i tun0) what goes 
through the tunnel nothing happens.

What is wrong with this? 

Where can I find a documentation on the tunnel interface, the way it 
works...???

Thankx

Emmanuel