From mboxrd@z Thu Jan 1 00:00:00 1970 From: "=?iso-8859-1?q?R=E9mi?= Denis-Courmont" Subject: Re: Linux vs FreeBSD Which is correct. Date: Wed, 17 Aug 2011 20:17:48 +0300 Message-ID: <201108172017.48683.remi@remlab.net> References: <4E4BF456.9000807@earthlink.net> Mime-Version: 1.0 Content-Type: Text/Plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Linux Kernel Network Developers To: sclark46@earthlink.net Return-path: Received: from yop.chewa.net ([91.121.105.214]:60675 "EHLO yop.chewa.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754201Ab1HQR0j convert rfc822-to-8bit (ORCPT ); Wed, 17 Aug 2011 13:26:39 -0400 In-Reply-To: <4E4BF456.9000807@earthlink.net> Sender: netdev-owner@vger.kernel.org List-ID: Le mercredi 17 ao=FBt 2011 20:03:18 Stephen Clark, vous avez =E9crit : > I have run into a situation where if I ping our HQ the response comes > back on a different > interface than what the request went out on. FreeBSD is happy and say= s > it got the response, > Linux is not and gives no indication it got a response. >=20 > So is FreeBSD wrong or is Linux wrong? Most distributions enable reverse path filtering by default. It can be disabled: # echo -n 0 > /proc/sys/net/ipv4/conf/all/rp_filter But you should probably fix the configuration instead (e.g. /etc/sysctl= =2Econf). --=20 R=E9mi Denis-Courmont http://www.remlab.net/ http://fi.linkedin.com/in/remidenis