From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: Possible networking regression in 3.6.0 Date: Mon, 01 Oct 2012 11:15:50 +0200 Message-ID: <1349082950.12401.669.camel@edumazet-glaptop> References: <5057455A.7050108@googlemail.com> <50588371.40103@googlemail.com> <505885DC.1060006@googlemail.com> <1347979239.26523.267.camel@edumazet-glaptop> <5059E40C.4070607@googlemail.com> <505D5A18.2080507@googlemail.com> <50643DA1.7070306@googlemail.com> <1348748042.5093.1168.camel@edumazet-glaptop> <50649567.2010704@googlemail.com> <1348779826.5093.1750.camel@edumazet-glaptop> <1348780624.5093.1767.camel@edumazet-glaptop> <50656C4A.8090302@googlemail.com> <1348831592.5093.2251.camel@edumazet-glaptop> <5068648C.7050005@googlemail.com> <1349034330.12401.210.camel@edumazet-glaptop> <506955F3.8050304@googlemail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: David Miller , netdev@vger.kernel.org, gpiez@web.de To: Chris Clayton Return-path: Received: from mail-bk0-f46.google.com ([209.85.214.46]:35005 "EHLO mail-bk0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752538Ab2JAJdA (ORCPT ); Mon, 1 Oct 2012 05:33:00 -0400 Received: by bkcjk13 with SMTP id jk13so4781160bkc.19 for ; Mon, 01 Oct 2012 02:32:59 -0700 (PDT) In-Reply-To: <506955F3.8050304@googlemail.com> Sender: netdev-owner@vger.kernel.org List-ID: On Mon, 2012-10-01 at 09:36 +0100, Chris Clayton wrote: > > 0 ICMP messages received > 0 input ICMP message failed. > ICMP input histogram: > 0 ICMP messages sent > 0 ICMP messages failed > ICMP output histogram: > > After: > > $ netstat -s > Icmp: > 4 ICMP messages received > 4 input ICMP message failed. > ICMP input histogram: > echo replies: 4 So icmp replies come back and are delivered to host instead of being forwarded. I wonder if MASQUERADE broke... Could you send iptables -t -nat -nvL conntrack -L # while ping is running from guest