From owner-freebsd-net@FreeBSD.ORG Mon Sep 24 10:57:49 2007 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 774C816A418 for ; Mon, 24 Sep 2007 10:57:49 +0000 (UTC) (envelope-from max@love2party.net) Received: from moutng.kundenserver.de (moutng.kundenserver.de [212.227.126.171]) by mx1.freebsd.org (Postfix) with ESMTP id EB88A13C43E for ; Mon, 24 Sep 2007 10:57:48 +0000 (UTC) (envelope-from max@love2party.net) Received: from [88.66.46.155] (helo=amd64.laiers.local) by mrelayeu.kundenserver.de (node=mrelayeu3) with ESMTP (Nemesis) id 0MKxQS-1IZldA2mYx-0008DK; Mon, 24 Sep 2007 12:57:38 +0200 From: Max Laier Organization: FreeBSD To: freebsd-net@freebsd.org Date: Mon, 24 Sep 2007 12:57:19 +0200 User-Agent: KMail/1.9.7 References: <20070924072517.GL19429@hal.rescomp.berkeley.edu> <46F77C27.9050400@net.utcluj.ro> In-Reply-To: <46F77C27.9050400@net.utcluj.ro> X-Face: ,,8R(x[kmU]tKN@>gtH1yQE4aslGdu+2]; R]*pL,U>^H?)gW@49@wdJ`H<=?utf-8?q?=25=7D*=5FBD=0A=09U=5For=3D=5CmOZf764=26nYj=3DJYbR1PW0ud?=>|!~,,CPC.1-D$FG@0h3#'5"k{V]a~.<=?utf-8?q?mZ=7D44=23Se=7Em=0A=09Fe=7E=5C=5DX5B=5D=5Fxj?=(ykz9QKMw_l0C2AQ]}Ym8)fU MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart3719595.xv0JBbdH5V"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200709241257.27219.max@love2party.net> X-Provags-ID: V01U2FsdGVkX19qSWHhcRHglcw4sGRNNpoO/4hhBEsIUvQkjH9 GmT1rAK4RvgfbenjDS8IaGKRS173VWbQ+av5LHa0XP5DeaFiLR MUHsGbphGTIc1BlPfWE0oEWOaiLdEWBgRbREcXCqP4= Cc: Cristian KLEIN , Christopher Cowart Subject: Re: Large-scale 1-1 NAT X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 24 Sep 2007 10:57:49 -0000 --nextPart3719595.xv0JBbdH5V Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Monday 24 September 2007, Cristian KLEIN wrote: > Hi, > > Christopher Cowart wrote: > > Hello, > > > > We're working on expanding our wireless network. Unfortunately, we're > > running out of IP addresses (aren't we all). As much as I'd love to > > just tell everyone to use IPv6, that isn't gonna fly. The next plan > > to consider is using an RFC1918 pool and NATing the traffic. > > > > If only it were that simple. The security folks have mandated that > > anyone who can talk to the internet at large must be individually > > indentifiable. This means having hundreds of users NATing to a single > > internet-routable IP isn't happening. > > We used to have this problem too, for some NATed networks. The solution > which has been adopted is to capture the flows on the gateway and send > them the security team. The netflow protocol is very well suited for > this. > > > The real question is: what's the best way to dynamically update the > > NAT table? > > You may use IPFW with IPNAT or PF instead. PF is able to reload its > configuration without disruption. Moreover, because the state table is > not flushed during a reload, you can even move NATed clients from one > public IP to another, without them noticing. In fact pf comes with an almost ready-made sollution. Check out authpf(8)= =20 for details. =2D-=20 /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News --nextPart3719595.xv0JBbdH5V Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQBG95gWXyyEoT62BG0RArAJAJsFohxWX58R9qWFN3gZBJbfKN3XYgCfeB2y +jtgieVrxM1nMQ32VikG1to= =djUd -----END PGP SIGNATURE----- --nextPart3719595.xv0JBbdH5V--