IPIP tunnel behind NAT

Baldur Gislason baldur at foo.is
Fri Apr 18 13:52:48 UTC 2008


It'll work fine. I've done this several times before.
However I've also had NAT implementations which didn't work this way but
this one should definitely work.

Baldur

On Fri, Apr 18, 2008 at 09:25:50AM -0400, Steve Bertrand wrote:
> Hi everyone,
> 
> I'm trying to configure a GIF IPIP tunnel from a FreeBSD box to a Cisco 
> router in order to route IPv6 blocks to a remote location.
> 
> However, I can't find good documentation to find out whether this will 
> work in behind a NAT device.
> 
> The FreeBSD box has a private IP, NAT'd 1:1. The Cisco is across the 
> 'net and is in the public network.
> 
> Will this tunnel setup work? If so, how? Will I have to move the FreeBSD 
> box outside of NAT and give it a public IP?
> 
> Regards,
> 
> Steve
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