Date: Fri, 22 Oct 1999 10:48:48 -0700 (PDT) From: Archie Cobbs <archie@whistle.com> To: mm@i.cz Cc: security@FreeBSD.ORG Subject: Re: GRE/IP 47/PPTP Message-ID: <199910221748.KAA67824@bubba.whistle.com> In-Reply-To: <XFMail.991022154258.mm@i.cz> from Martin Machacek at "Oct 22, 1999 03:42:58 pm"
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Martin Machacek writes: > Well, GRE tunnelling is something completely different from suporting GRE in > NAT. I can imagine doing one-to-one NAT and passing GRE, but doing many to one > NAT and supporting multiple GRE streams is IMHO impossible. There is no > parameter in the GRE encapsulation that would allow you to identify the real > internal recipient if you NAT multiple internal addresses to one external > address. True in general.. however, if all you're using GRE for is PPTP, then you can multiplex on the call identifier in the PPTP/GRE header. -Archie ___________________________________________________________________________ Archie Cobbs * Whistle Communications, Inc. * http://www.whistle.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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