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Date:      Sun, 10 Jan 1999 14:01:27 +0000
From:      Brian Somers <brian@Awfulhak.org>
To:        "Dru Nelson" <dnelson@redwoodsoft.com>
Cc:        freebsd-hackers@FreeBSD.ORG
Subject:   Re: Tunneling GRE through NAT? 
Message-ID:  <199901101401.OAA00892@keep.lan.Awfulhak.org>
In-Reply-To: Your message of "19 Dec 1998 02:58:37 GMT." <19981219025837.1592.qmail@findmail.com> 

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> Hi,
> 
> I wrote a patch to natd to allow it pass GRE/ ie
> PPTP. Check with the maintainers of natd on the 
> latest version.

So you've mentioned before.  Neither Charles or Ari (cc'd) seem to 
have mentioned it since....

> > I'm writing here because of what I found via the mailing list search at
> > www.freebsd.org:
> > 
> > --
> > On Wed, 1 Apr 1998, M.C Wong wrote:
> > 
> > > I wonder if there is any implementation, user-land or kernel, of
> > > tunneling protocol based on GRE (rfc1701, rfc1702) ?
> > 
> > I remember some rumblings in -hackers about someone implementing a generic
> > tunnelling system.  I think a GRE tunnel was part of the inspiration for
> > the project.  Check the mail archives for info.
> > 
> > Doug White                              | University of Oregon  
> > Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
> > http://gladstone.uoregon.edu/~dwhite    | Computer Science Major
> > --
> > 
> > Did this go anywhere?
> > 
> > I have a number of Windows users who'd like to be able to access some
> > WindowsNT based services using Microsoft's PPTP.
> > 
> > As it stands, the WindowsNT machine is behind a FreeBSD machine running
> > natd which is in turn behind a Cisco which acts as a firewall.
> > 
> > I can pass PPTP packets (port 1723) through to the FreeBSD machine and I
> > can pass the GRE packets associated with PPTP through to the FreeBSD
> > machine.
> > 
> > I can then tunnel the PPTP packets through natd to the NT box, but I
> > haven't found any way to tunnel GRE through the NAT. 
> > 
> > Did this discussion of tunneling GRE through NAT ever go anywhere? Has
> > anyone written any software that does this? Is there any reason why this
> > would not be possible? (i.e., any reason why I shouldn't just pick up my
> > network programming book and write it myself?)
> > 
> > Any help is much appreciated.
> > 
> > 
> > James Snow
> > 
> >           * * * * * * * * * * * * * * * * * * * * * * * * * * * * 
> >           * We live in the short term | sno at teardrop dot org * 
> >           *   and hope for the best.  |  I am Geek. Hear me ^G  *
> >           * * * * * * * * * * * * * * * * * * * * * * * * * * * *

-- 
Brian <brian@Awfulhak.org> <brian@FreeBSD.org> <brian@OpenBSD.org>
      <http://www.Awfulhak.org>;
Don't _EVER_ lose your sense of humour !



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