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Date: Fri, 10 Jun 2005 22:56:06 -0700
To: Gianmarco Giovannelli <gmarco@masternet.it>
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From: stephen@dino.dnsalias.com (Stephen J. Bevan)
Cc: Greg 'groggy' Lehey <grog@freebsd.org>, FreeBSD-net@freebsd.org
Subject: Re: Problems with gif tunnels
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Gianmarco Giovannelli writes:
 > Hi Greg, I have follow with interest this thread because I had a similar 
 > problem sometimes ago and we din't succeded in resolve it as I like ...
 > 
 > I had to connect a couple of  a nets with a freebsd box and a linux box 
 > (not managed by me). They insist to use the ipip tunnel (p:4) and I think I 
 > should use the  nos-tun interface ...

If Linux is using ipip then to connect to it from *BSD you should use gif(4).

 > Now I see I could simply use the gif interface (which I wrongly suppose did 
 > only GRE tunnel :-) to connect to an ipip linux tunnel. Is this right ?

Yes.