Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270346AbTHQQBo (ORCPT ); Sun, 17 Aug 2003 12:01:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S270332AbTHQQBo (ORCPT ); Sun, 17 Aug 2003 12:01:44 -0400 Received: from 5.Red-80-32-157.pooles.rima-tde.net ([80.32.157.5]:5897 "EHLO smtp.newipnet.com") by vger.kernel.org with ESMTP id S270328AbTHQQBl (ORCPT ); Sun, 17 Aug 2003 12:01:41 -0400 Message-ID: <200308171759540391.00AA8CAB@192.168.128.16> In-Reply-To: <1061134091.21886.40.camel@dhcp23.swansea.linux.org.uk> References: <20030728213933.F81299@coredump.scriptkiddie.org> <200308171509570955.003E4FEC@192.168.128.16> <200308171516090038.0043F977@192.168.128.16> <1061127715.21885.35.camel@dhcp23.swansea.linux.org.uk> <200308171555280781.0067FB36@192.168.128.16> <1061134091.21886.40.camel@dhcp23.swansea.linux.org.uk> X-Mailer: Calypso Version 3.30.00.00 (4) Date: Sun, 17 Aug 2003 17:59:54 +0200 From: "Carlos Velasco" To: "Alan Cox" Cc: "Lamont Granquist" , "Bill Davidsen" , "David S. Miller" , bloemsaa@xs4all.nl, "Marcelo Tosatti" , netdev@oss.sgi.com, linux-net@vger.kernel.org, layes@loran.com, torvalds@osdl.org, "Linux Kernel Mailing List" Subject: Re: [2.4 PATCH] bugfix: ARP respond on all devices Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1143 Lines: 35 On 17/08/2003 at 16:28 Alan Cox wrote: >Linux doesn't issue "bad" requests. Linux will reply when it is >asked for an address that it owns, as per RFC826, unless you chose >to change the behaviour with things like arpfilter. We are not talking about ARP Replies, we are talking about ARP Requests. You can see the Richard post here, same issue I reported several weeks ago: http://marc.theaimsgroup.com/?l=linux-net&m=106094924813337&w=2 == On eth0, we see: 11:23:55.650514 0:4:75:ca:c4:ef Broadcast arp 42: arp who-has 10.10.10.1 tell 212.xxx.yyy.9 == Linux is sending an ARP Request to a LAN where the source IP address of the packet has not any sense in that IP network. And, at least, 2 RFCs are stating that other devices should not reply to this packet. Currently know Cisco, Foundry; possibly others, and possibly others coming as ARP storms are not desired. Regards, Carlos Velasco - 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/