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Date:      Tue, 13 Aug 2002 13:16:37 -0700
From:      Lars Eggert <larse@ISI.EDU>
To:        Julian Elischer <julian@elischer.org>
Cc:        Les Biffle <les@safety.net>, hackers@freebsd.org
Subject:   Re: IP routing question
Message-ID:  <3D596925.60906@isi.edu>
References:  <Pine.BSF.4.21.0208131245330.17577-100000@InterJet.elischer.org>

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Julian Elischer wrote:
> On Tue, 13 Aug 2002, Les Biffle wrote:
>>I want to do the following:
>>
>>1.  Create "n" IPSEC VPN tunnels
>>2.  Create "n" VLAN pseudo interfaces
>>3.  Route IP Packets based on their arrival iface/tunnel out through
>>    a corresponding tunnel/iface.
>>
>>For example, I want to route all packets received through VPN tunnel "2"
>>out through VLAN "2," and all packets received on VLAN "2" out through
>>VPN "2," without regard to source or destination IP Addresses.
> 
> incoming packets should be selectabl in ipfw by using the 
> clause 
> "in recv gif0" 

Minor point: IPsec tunnel mode tunnels aren't gif tunnels - he'd need to 
use IPIP tunnels + IPsec transport mode in that case (see 
draft-touch-ipsec-vpn04.txt), which I recommend anyway, of course :-)

I hadn't thought of using the ipfw "in" selector, good idea!

Lars
-- 
Lars Eggert <larse@isi.edu>           USC Information Sciences Institute

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