From owner-freebsd-questions@FreeBSD.ORG Wed Jul 8 18:09:14 2009 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 93C1910657F0 for ; Wed, 8 Jul 2009 18:09:14 +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 A5DDF8FC08 for ; Wed, 8 Jul 2009 18:09:13 +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 (8.14.3/8.14.3) with ESMTP id n68I95bV063448; Wed, 8 Jul 2009 19:09:06 +0100 (BST) (envelope-from m.seaman@infracaninophile.co.uk) X-DKIM: Sendmail DKIM Filter v2.8.3 smtp.infracaninophile.co.uk n68I95bV063448 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=infracaninophile.co.uk; s=200708; t=1247076546; bh=QsunUoQL3jBWBB03StbPV72m3Sdgc2H4ER16vY8t9ow=; 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=Message-ID:=20<4A54E0BB.8070405@infracaninophile.co.uk>|Date:=20W ed,=2008=20Jul=202009=2019:08:59=20+0100|From:=20Matthew=20Seaman= 20|Organization:=20Infracaninophi le|User-Agent:=20Thunderbird=202.0.0.22=20(X11/20090625)|MIME-Vers ion:=201.0|To:=20Daniel=20Underwood=20|CC:=2 0freebsd-questions@freebsd.org|Subject:=20Re:=20Network=20traffic= 20monitoring:=20BSD=20monitor=20&=20verifying=20encryption|Referen ces:=20=09=20<4A54AA5E.80706@infracaninophile.co.uk>=20|In-Reply-To:=20|X-Enigmai l-Version:=200.95.6|Content-Type:=20multipart/signed=3B=20micalg=3 Dpgp-sha256=3B=0D=0A=20protocol=3D"application/pgp-signature"=3B=0 D=0A=20boundary=3D"------------enigDB93B684368E95CD2E9E4232"; b=ZzUyOnaQUfUgjwy7JrXkhaUIrwyXvPPgI+lLOLq7xrquACv6I25TPNzUMiO5o7rvz vYMHrcUg3Q2hCPUHpItVz72OWZbgZsFgQKo19kyxucedQo3oGHLo6d1j4ZsoG36Bk6 sd2rWBdPMMSLJaIaSMnFsMtX/606chULRcQjs4CE= X-Authentication-Warning: happy-idiot-talk.infracaninophile.co.uk: Host localhost [IPv6:::1] claimed to be happy-idiot-talk.infracaninophile.co.uk Message-ID: <4A54E0BB.8070405@infracaninophile.co.uk> Date: Wed, 08 Jul 2009 19:08:59 +0100 From: Matthew Seaman Organization: Infracaninophile User-Agent: Thunderbird 2.0.0.22 (X11/20090625) MIME-Version: 1.0 To: Daniel Underwood References: <4A54AA5E.80706@infracaninophile.co.uk> In-Reply-To: X-Enigmail-Version: 0.95.6 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------enigDB93B684368E95CD2E9E4232" X-Virus-Scanned: clamav-milter 0.95.2 at 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@freebsd.org Subject: Re: Network traffic monitoring: BSD monitor & verifying encryption 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, 08 Jul 2009 18:09:14 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigDB93B684368E95CD2E9E4232 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Daniel Underwood wrote: > Thanks for the help. >=20 > I couldn't find any flags/fields in TCP packets indicated whether > encrypted (as in the case of SSH packets). There isn't any, right? Correct: there isn't anything like that in the TCP headers. Encryption on TCP streams is an application level thing that only affects packet payloads. There are transport layer encryption protocols -- eg. IPSec, OpenVPN, etc= =2E -- but those allow tunnelling TCP streams through them and aren't necessa= rily TCP themselves. Cheers, 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 --------------enigDB93B684368E95CD2E9E4232 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.12 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEUEAREIAAYFAkpU4MEACgkQ8Mjk52CukIxizACWI6yQui1AZOQHWBHoZidulXUQ HACfaFmTmSlByEfpphk0larrJSbpTlQ= =AtbU -----END PGP SIGNATURE----- --------------enigDB93B684368E95CD2E9E4232--