From owner-freebsd-security Fri Feb 2 2:55:41 2001 Delivered-To: freebsd-security@freebsd.org Received: from prg.traveller.cz (prg.traveller.cz [193.85.2.2]) by hub.freebsd.org (Postfix) with ESMTP id 400F537B491 for ; Fri, 2 Feb 2001 02:55:24 -0800 (PST) Received: from prg.traveller.cz (prg.traveller.cz [193.85.2.2]) by prg.traveller.cz (8.9.3[EUnet-CZ](2)/8.9.3) with ESMTP id LAA03070 for ; Fri, 2 Feb 2001 11:55:22 +0100 (CET) Date: Fri, 2 Feb 2001 11:55:22 +0100 (CET) From: Michal Mertl To: security@freebsd.org Subject: strange dropped packets Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I've installed and configured several FreeBSD boxes (>=4.1). On all of them I use log_in_vain="YES" in rc.conf. Sometime I also install ipfilter (with rules with minimal holes in and outbound traffic with "keep state"). Either with ipfilter installed or not I see dropped packets in /var/log/messages (result of log_in_vain) which seems to me like last packets of a regular communications open from inside (either UDP (dns queries) or TCP (mostly web)). It doesn't stop anything from working but I'm curious what it may mean. I think sometimes FreeBSD thinks tcp or udp connection is closed when the other end doesn't think so (and because the packets aren't catched by ipfilter I suspect the problem on FreeBSD's side). -- Michal Mertl mime@traveller.cz To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message