From owner-freebsd-questions@FreeBSD.ORG Wed Jul 9 06:29:38 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2E9941065693 for ; Wed, 9 Jul 2008 06:29:38 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from smtp.infracaninophile.co.uk (gate6.infracaninophile.co.uk [IPv6:2001:8b0:151:1::1]) by mx1.freebsd.org (Postfix) with ESMTP id 9D6048FC19 for ; Wed, 9 Jul 2008 06:29:37 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from happy-idiot-talk.infracaninophile.co.uk (localhost [IPv6:::1]) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.14.2/8.14.2) with ESMTP id m696TUDC088972; Wed, 9 Jul 2008 07:29:31 +0100 (BST) (envelope-from m.seaman@infracaninophile.co.uk) X-DKIM: Sendmail DKIM Filter v2.6.0 smtp.infracaninophile.co.uk m696TUDC088972 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=infracaninophile.co.uk; s=200708; t=1215584971; bh=m4FntlbSgJhbnH 5rxKhLP6uM0u9q56prY1k9CL4em58=; h=Message-ID:Date:From:MIME-Version: To:CC:Subject:References:In-Reply-To:Content-Type:Cc:Content-Type: Date:From:In-Reply-To:Message-ID:Mime-Version:References:To; z=Mes sage-ID:=20<48745AC9.5010200@infracaninophile.co.uk>|Date:=20Wed,=2 009=20Jul=202008=2007:29:29=20+0100|From:=20Matthew=20Seaman=20|Organization:=20Infracaninophile|User -Agent:=20Thunderbird=202.0.0.14=20(X11/20080607)|MIME-Version:=201 .0|To:=20Chuck=20Swiger=20|CC:=20FreeBSD=20Questio ns=20|Subject:=20Re:=20ports|Referen ces:=20<4873927E.3050307@godfur.com>=20<44ej64s4e7.fsf@be-well.ilk. org>=09<48739EB6.4040909@infracaninophile.co.uk>=09<200807082004.25 873.fbsd.questions@rachie.is-a-geek.net>=20|In-Reply-To:=20|X-Enigmail-Version:=200.95.6|Content-Type:=20mult ipart/signed=3B=20micalg=3Dpgp-sha256=3B=0D=0A=20protocol=3D"applic ation/pgp-signature"=3B=0D=0A=20boundary=3D"------------enig2BFBB89 DE9FCC86D0804B194"; b=XjqZxPwBauOMHKZBYQ0C908fkvmQS5NSPZx/5r2m4S1xI sfrXzBo8WwlWM+5wxVNX7t6n7a9ZGhPITl4gA5ypRYBVDL/XkPbpB9sY7V4kRpEYkFK Kuzx/gu+MWJpDn//t8yV8h9YaRua3jkiZG01FHu0XOgn5zah2Y8aq9jS0N8= Message-ID: <48745AC9.5010200@infracaninophile.co.uk> Date: Wed, 09 Jul 2008 07:29:29 +0100 From: Matthew Seaman Organization: Infracaninophile User-Agent: Thunderbird 2.0.0.14 (X11/20080607) MIME-Version: 1.0 To: Chuck Swiger References: <4873927E.3050307@godfur.com> <44ej64s4e7.fsf@be-well.ilk.org> <48739EB6.4040909@infracaninophile.co.uk> <200807082004.25873.fbsd.questions@rachie.is-a-geek.net> In-Reply-To: X-Enigmail-Version: 0.95.6 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------enig2BFBB89DE9FCC86D0804B194" X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0 (smtp.infracaninophile.co.uk [IPv6:::1]); Wed, 09 Jul 2008 07:29:31 +0100 (BST) X-Virus-Scanned: ClamAV 0.93.1/7671/Wed Jul 9 05:18:10 2008 on happy-idiot-talk.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=-3.0 required=5.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VERIFIED,NO_RELAYS autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on happy-idiot-talk.infracaninophile.co.uk Cc: FreeBSD Questions Subject: Re: ports X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Jul 2008 06:29:38 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig2BFBB89DE9FCC86D0804B194 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Chuck Swiger wrote: > On Jul 8, 2008, at 11:04 AM, Mel wrote: >> On Tuesday 08 July 2008 19:07:02 Matthew Seaman wrote: >>> You can configure named to always send packets using a >>> fixed port number (which can be helpful for firewalling) >> >> Purely outof interest, which (useful) firewall/nat rules cannot be=20 >> made with >> dest port 53, that can be made with source port 53. Not talking syntax= , >> but "business logically". >=20 > Please note that using the same port for answering queries makes it=20 > vastly easier for somebody to spoof your DNS traffic. Unless you are=20 > one of the handful using DNSSEC, that is. >=20 Yes. In the light of this, released last night: http://www.kb.cert.org/vuls/id/800113 fixing the response port is a bad idea. A really bad idea. Matthew --=20 Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW --------------enig2BFBB89DE9FCC86D0804B194 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEAREIAAYFAkh0WsoACgkQ8Mjk52CukIwmWACgk4zKrX/+jfWmtXZaRe8moNDQ atIAnAwd/kDH16NFFlhI6Jvl5W+umsxG =JX6a -----END PGP SIGNATURE----- --------------enig2BFBB89DE9FCC86D0804B194--