Subject: Re: stf(4) and NAT protocol forwarding
To: Jonathan A. Kollasch <>
From: Pavel Cahyna <>
List: tech-net
Date: 01/09/2006 10:10:36
On Sat, Jan 07, 2006 at 10:57:17PM -0600, Jonathan A. Kollasch wrote:
> Hi,
> 	Because my ADSL gateway (running OpenWrt Busybox/Linux\ 2.4)
> isn't providing me with stable 6to4 connectivity (long story, not
> on topic here) I've decided to switch my 6to4 router back to NetBSD.
> I've got full control over iptables on the ADSL gateway, thus I
> can do protocol forwarding.  However, I can't get stf(4) to accept
> packets directed at its private IPv4 address.  I'm using the binat

I can only say that it works for me in 3.0.

ipnat.conf :

bimap ex0 xx.xx.xx.xx/32 -> ipv6


inet6 2002:xxxx:xxxx::1 prefixlen 16 up


inet xx.xx.xx.xx prefixlen 32 alias

(xxxx:xxxx is the hex representation of xx.xx.xx.xx).

> rule as suggested the last time this subject came up, it seems to
> let the packets get out.  I've tried using the link2 bit on stf0

Is the source address set to your private address, or to the public one?
(when seen by tcpdump). If it is the public one, it means that NAT is not

Bye	Pavel