Date: Thu, 14 Jul 2005 10:37:38 +0400 From: Alex Povolotsky <tarkhil@webmail.sub.ru> To: compunction <compunction@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: GRE and PF problem Message-ID: <42D60832.9090206@webmail.sub.ru> In-Reply-To: <9f9a8c4005071322311907b4b@mail.gmail.com> References: <42D536EC.5030500@webmail.sub.ru> <9f9a8c4005071322311907b4b@mail.gmail.com>
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compunction wrote: >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. > > The most painful thing is that pf's nat works for GRE - SOMETIMES :-( The only thing firewall needs to implement for natting GRE is creation of two rules (forward and back) for GRE packet, just like it does for ICMP. I'm not a firewall writer, but as far as I understand general procedural programming, it cannot be THAT complicated. Alex.
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