From owner-freebsd-net@FreeBSD.ORG Wed Feb 25 04:51:54 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 05EDA16A4CE for ; Wed, 25 Feb 2004 04:51:54 -0800 (PST) Received: from smtp3.libero.it (smtp3.libero.it [193.70.192.127]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9050643D1F for ; Wed, 25 Feb 2004 04:51:53 -0800 (PST) (envelope-from ml.ventu@flashnet.it) Received: from soth.ventu (151.37.23.42) by smtp3.libero.it (7.0.020-DD01) id 401D5C59009F27FA for freebsd-net@freebsd.org; Wed, 25 Feb 2004 13:51:52 +0100 Received: from mailer (xanatar.ventu [10.1.2.6]) by soth.ventu (8.12.6p3/8.12.6) with SMTP id i1PCppmZ031547 for ; Wed, 25 Feb 2004 13:51:52 +0100 (CET) (envelope-from ml.ventu@flashnet.it) Message-Id: <200402251251.i1PCppmZ031547@soth.ventu> To: freebsd-net@freebsd.org Priority: Normal X-Mailer: Post Road Mailer for OS/2 (Green Edition Ver 3.0) Date: Wed, 25 Feb 2004 13:51:52 EST From: Andrea Venturoli Subject: Re: Bad loopback traffic not stopped by ipfw. X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Andrea Venturoli List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Feb 2004 12:51:54 -0000 ** Reply to note from Iasen Kostov Wed, 25 Feb 2004 14:37:25 +0200 >netstat -s -p ip >.. >.. >.. > 3575124 datagrams with bad address in header > > Could it be this that drops "bad" packets before they enter the IPFW ? Nice, it could be, but I'm not so expert as to tell for sure. Can someone with more insight confirm? And possibly provide a pointer on why it is so, who blocks them, which are the criteria, ...? In fact I think they ARE blocked, because otherwise I would see "Connection attempt ..." log entries. Here it shows: 72641 datagrams with bad address in header bye & Thanks av.