From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David S. Miller" Subject: Re: address pingable with interface down Date: Wed, 10 May 2006 13:00:12 -0700 (PDT) Message-ID: <20060510.130012.128043400.davem@davemloft.net> References: <20060510194818.GB4460@junkers.homelinux.net> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org Return-path: Received: from dsl027-180-168.sfo1.dsl.speakeasy.net ([216.27.180.168]:33178 "EHLO sunset.davemloft.net") by vger.kernel.org with ESMTP id S1750813AbWEJUAr (ORCPT ); Wed, 10 May 2006 16:00:47 -0400 To: jadevree@mtu.edu In-Reply-To: <20060510194818.GB4460@junkers.homelinux.net> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Jon DeVree Date: Wed, 10 May 2006 15:48:18 -0400 > I've noticed in the past that the address owned by an interface is > still pingable after that interface is brought down. People bring this up all the time and this behavior is intentional. Linux uses a "host based" addressing model, IP addresses are owned by the host, not individual interfaces. So as long as the IP address is configured to some interface, we will accept packets destinated to that IP address as our's. This is becoming a serious FAQ and very tiresome to explain over and over again.