From owner-freebsd-net@FreeBSD.ORG Tue Dec 14 08:05:54 2004 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1F7E316A4CE for ; Tue, 14 Dec 2004 08:05:54 +0000 (GMT) Received: from gandalf.online.bg (gandalf.online.bg [217.75.128.9]) by mx1.FreeBSD.org (Postfix) with SMTP id E6B0743D72 for ; Tue, 14 Dec 2004 08:05:52 +0000 (GMT) (envelope-from roam@ringlet.net) Received: (qmail 32690 invoked from network); 14 Dec 2004 08:05:48 -0000 Received: from unknown (HELO straylight.ringlet.net) (213.16.36.84) by gandalf.online.bg with SMTP; 14 Dec 2004 08:05:48 -0000 Received: (qmail 4322 invoked by uid 1000); 14 Dec 2004 08:05:50 -0000 Date: Tue, 14 Dec 2004 10:05:50 +0200 From: Peter Pentchev To: freebsd-net@FreeBSD.org Message-ID: <20041214080549.GC3183@straylight.m.ringlet.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="rQ2U398070+RC21q" Content-Disposition: inline User-Agent: Mutt/1.5.6i cc: Darren Reed Subject: IPFilter, mpd/Netgraph problems on RELENG_4 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Dec 2004 08:05:54 -0000 --rQ2U398070+RC21q Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi, I am seeing a lot of ICMP Must Fragment packets with incorrect ICMP checksums on a RELENG_4 box which holds up 40-60 PPTP (mpd/Netgraph) VPN connections at any given time. The peer understandably ignores the ICMP packet with a bad checksum and never fragments the offending TCP packet, effectively killing the connection after a while. A major point is that I'm only seeing them on the interfaces NAT'ed by ipnat. Is anybody else having trouble with ICMP checkums with IPFilter 3.4.35 on a reasonably recent RELENG_4 box? FreeBSD unnamed 4.10-STABLE FreeBSD 4.10-STABLE #1: Thu Dec 2 10:31:16 EET = 2004 root@unnamed:/usr/obj/usr/src-bsd/4.0S/src/sys/UNNAMED i386 drwxr-xr-x 2 root wheel 512 Dec 2 11:43 /var/db/pkg/mpd-3.18_2 G'luck, Peter --=20 Peter Pentchev roam@ringlet.net roam@cnsys.bg roam@FreeBSD.org PGP key: http://people.FreeBSD.org/~roam/roam.key.asc Key fingerprint FDBA FD79 C26F 3C51 C95E DF9E ED18 B68D 1619 4553 This sentence was in the past tense. --rQ2U398070+RC21q Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQFBvp7d7Ri2jRYZRVMRAtAZAJ43LBp23NZxxdR4xYU4dNMtfrbtogCbBHQj KuxegUvh8sEPZgJj24zrnbw= =FgDi -----END PGP SIGNATURE----- --rQ2U398070+RC21q--