Date: Wed, 2 Aug 2000 10:41:09 -0700 (PDT) From: Julian Elischer <julian@elischer.org> To: Archie Cobbs <archie@whistle.com> Cc: Ruslan Ermilov <ru@FreeBSD.ORG>, Charles Mott <cmott@scientech.com>, Erik Salander <erik@whistle.com>, net@FreeBSD.ORG, Brian Somers <brian@Awfulhak.org>, Eivind Eklund <perhaps@yes.no> Subject: Re: Improved PPTP support for libalias(3) Message-ID: <Pine.BSF.4.10.10008021038420.79587-100000@InterJet.elischer.org> In-Reply-To: <200008021652.JAA81974@bubba.whistle.com>
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On Wed, 2 Aug 2000, Archie Cobbs wrote: > > > > > If you think about it for a second you can see why: when a machine > > > > > receives a GRE packet, it identifies the call using the pair > > > > > <sourceIP, CallID>. That means that there can be at most ONE entity > > > > > living at sourceIP doling out CallID's for calls to the local > > > > > machine/IP address.. otherwise CallID's would not be guaranteed > > > > > to be unique. > > ^^^^^^^^^^^^^^^^^ this is why ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > > > > This is all right, except libalias(3) is supposed to intercept > > > > outgoing PPTP call requests messages and alias CallID to be unique, > > > > see AliasHandlePptpOut(). > > Because there can be only one "controlling authority" for each > IP address.. see above. but surely, the CALLID is unique in the instance of NATD, which is a 1:1 relationship with the SourceIP that teh server sees, so there is only ever one CALLID/SRCIP pair per session and they are unique. even with multiple clients behind the nat curtain. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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