From owner-freebsd-net@FreeBSD.ORG Wed Feb 25 06:21:37 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 1DE7B16A4CE for ; Wed, 25 Feb 2004 06:21:37 -0800 (PST) Received: from cell.sick.ru (cell.sick.ru [217.72.144.68]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4D7B343D1D for ; Wed, 25 Feb 2004 06:21:36 -0800 (PST) (envelope-from glebius@cell.sick.ru) Received: from cell.sick.ru (glebius@localhost [127.0.0.1]) by cell.sick.ru (8.12.9/8.12.8) with ESMTP id i1PELYQE086454 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 25 Feb 2004 17:21:35 +0300 (MSK) (envelope-from glebius@cell.sick.ru) Received: (from glebius@localhost) by cell.sick.ru (8.12.9/8.12.6/Submit) id i1PELYHt086453; Wed, 25 Feb 2004 17:21:34 +0300 (MSK) Date: Wed, 25 Feb 2004 17:21:34 +0300 From: Gleb Smirnoff To: Iasen Kostov Message-ID: <20040225142134.GA86436@cell.sick.ru> Mail-Followup-To: Gleb Smirnoff , Iasen Kostov , freebsd-net@freebsd.org References: <200402242315.i1ONFbmZ028103@soth.ventu> <403C9705.3060108@OTEL.net> <10324604148.20040225164703@b-o.ru> <20040225141642.GB86194@cell.sick.ru> <403CAF07.5040906@OTEL.net> Mime-Version: 1.0 Content-Type: text/plain; charset=koi8-r Content-Disposition: inline In-Reply-To: <403CAF07.5040906@OTEL.net> User-Agent: Mutt/1.5.6i cc: freebsd-net@freebsd.org Subject: Re: Bad loopback traffic not stopped by ipfw. 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: Wed, 25 Feb 2004 14:21:37 -0000 On Wed, Feb 25, 2004 at 04:19:51PM +0200, Iasen Kostov wrote: I> >>16:26:23.287642 0:1:2:9>c:cf:e2 0:02:55:b0:90:e4 0800 60: 127.0.0.1.80 > I> >>192.168.118.205.1046: R 0:0(0) ack 1959723009 win 0 I> > I> >This is some kind of Win32 virus. This floods can be easily I> >stopped by ipfw rule: I> > I> >deny tcp from any to any tcpflags rst,ack I> > I> > I> > I> These packets never reach IPFW as we can see. Ughu. Really. But I have millions of them from non-localhost addresses. P.S. This is really off-topic already. We should move to -isp@ may be. -- Totus tuus, Glebius. GLEBIUS-RIPN GLEB-RIPE