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Date: Thu, 14 Jul 2005 01:31:36 -0400
From: compunction <compunction@gmail.com>
To: Alex Povolotsky <tarkhil@webmail.sub.ru>
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References: <42D536EC.5030500@webmail.sub.ru>
Cc: freebsd-net@freebsd.org
Subject: Re: GRE and PF problem
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GRE needs to pass bidirectional.  You will need a binat to make it
work.  I have not found a firewall that will allow GRE to work with a
many to one nat.

-Mark

On 7/13/05, Alex Povolotsky <tarkhil@webmail.sub.ru> wrote:
> Hello!
>=20
> I'm using FreeBSD (5.3-RELEASE-p5) as internet access server, and I have
> to NAT GRE packets. I'm using pf.
>=20
> The problem is that SOMETIMES PF fails to create proper rule using nat,
> while binat works fine.
>=20
> Not only I do not want to expose Windows boxes (even if those addresses
> are firewalled), but it's also a terrible waste of real IPs.
>=20
> Can anyone point me if I have incorrect PF config, or PF just work
> poorly with gre?
>=20
> Alex.
>=20
>=20
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