Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 22 Jul 2001 11:27:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 22 Jul 2001 11:27:29 -0400 Received: from mail11.svr.pol.co.uk ([195.92.193.23]:9480 "EHLO mail11.svr.pol.co.uk") by vger.kernel.org with ESMTP id ; Sun, 22 Jul 2001 11:27:25 -0400 From: "Alan J. Wylie" MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15194.61662.338810.87576@glaramara.freeserve.co.uk> Date: Sun, 22 Jul 2001 16:27:26 +0100 To: linux-kernel@vger.kernel.org, Rusty Russell Subject: ipt_unclean: TCP flags bad: 4 X-Mailer: VM 6.93 under Emacs 20.7.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Original-Recipient: rfc822;linux-kernel-outgoing I've just upgraded to 2.4.7, and I'm getting lots of errors: ipt_unclean: TCP flags bad: 4 I only see them when my ppp link is up - pppd version 2.4.0 Looking at ipt_unclean.c it seems that this message will be generated when I send a packet with flags set to RST only. I've run a ppp session with the pppd option "record" turned on, and analysed the output with "ethereal". This is indeed what is on the wire. I'm no expert on TCP I'm afraid. The complete TCP stream follows: ------------------------------------------------------------------------------ No. Time Source Destination Protocol Info 129 12.800000 62.137.113.223 news.svr.pol.co.uk TCP 1148 > nntp [SYN] Seq=3684831495 Ack=0 Win=5840 Len=0 131 12.900000 news.svr.pol.co.uk 62.137.113.223 TCP nntp > 1148 [SYN, ACK] Seq=2607886663 Ack=3684831496 Win=32736 Len=0 137 13.300000 62.137.113.223 news.svr.pol.co.uk TCP 1148 > nntp [FIN, ACK] Seq=3684831502 Ack=2607887466 Win=7090 Len=0 142 13.400000 62.137.113.223 news.svr.pol.co.uk TCP 1148 > nntp [RST] Seq=3684831503 Ack=0 Win=0 Len=0 ------------------------------------------------------------------------------ -- Alan J. Wylie http://www.glaramara.freeserve.co.uk/ "Perfection [in design] is achieved not when there is nothing left to add, but rather when there is nothing left to take away." Antoine de Saint-Exupery - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/