Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263467AbUCYRRd (ORCPT ); Thu, 25 Mar 2004 12:17:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263509AbUCYRQJ (ORCPT ); Thu, 25 Mar 2004 12:16:09 -0500 Received: from sea2-dav66.sea2.hotmail.com ([207.68.164.201]:24328 "EHLO hotmail.com") by vger.kernel.org with ESMTP id S263483AbUCYROP convert rfc822-to-8bit (ORCPT ); Thu, 25 Mar 2004 12:14:15 -0500 X-Originating-IP: [80.204.235.254] X-Originating-Email: [pupilla@hotmail.com] From: "Marco Berizzi" To: Subject: proxy arp behaviour Date: Thu, 25 Mar 2004 18:14:10 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1123 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1123 Message-ID: X-OriginalArrivalTime: 25 Aug 2001 04:49:10.0421 (UTC) FILETIME=[47C2E450:01C12D21] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 986 Lines: 34 Hello everybody, I would like some info about proxy arp behaviour. I have a firewall linux running kernel 2.4.25 with 3 NIC. Proxy arp is enabled on two of them (eth0 and eth1). eth1 configuration is here: ifconfig eth1 10.77.77.1 broadcast 10.77.77.3 netmask 255.255.255.252 ip route del 10.77.77.0/30 dev eth1 ip route add 172.17.1.0/24 dev eth1 echo 1 > /proc/sys/net/ipv4/conf/eth1/proxy_arp Hosts connected to eth1 are all 172.17.1.0/24. The linux box is now replying to arp requests that are sent by 172.17.1.0/24 hosts on the eth1 network segment. Is this because ip on eth1 is 10.77.77.1? I think that linux should not reply to arp request for 172.17.1.0/24 because of: ip route add 172.17.1.0/24 dev eth1 Is this a bug? TIA - 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/