From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id EF13A1381F3 for ; Sun, 1 Sep 2013 18:35:50 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id D6821E0FFF; Sun, 1 Sep 2013 18:35:46 +0000 (UTC) Received: from mail-wg0-f44.google.com (mail-wg0-f44.google.com [74.125.82.44]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id BA29AE0F0F for ; Sun, 1 Sep 2013 18:35:45 +0000 (UTC) Received: by mail-wg0-f44.google.com with SMTP id x12so3046745wgg.23 for ; Sun, 01 Sep 2013 11:35:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=3/SMmf+9edd4AGPWy6iaM62agUmwtBINkzkgFDTtIks=; b=xEEaQdJ0BvdftHG352WTYm+cFi5YpxsjJYHIszxRNfMscDY0JGzk7PqJM/w7kBJ/qH lieHdAz5eei2icKsqGCN0p5GOkkvCvF9BXb2aoSlXj4+B/ZilROXvW9z2ZFuuYZsyFI3 r3hurtk3epQRvNfuqRfuVFR5SZx9XmyBmjrozvvTF+E+qQkNzTYUdzBfD9SNElznvsIs lEutUgSloT6lWh7wwecoM6XSx1vOsqz+qLRxhEWJaDfC575F/NDYP8eAsfWXI2ac4Y+W E2ZTSipuOdzVWO8Uj6eebMXBRWqMOzuVXgNtxq5sq/yjv07KMFNPizCf/8MFJDgSDkEt xh2Q== X-Received: by 10.180.187.41 with SMTP id fp9mr10363738wic.33.1378060544353; Sun, 01 Sep 2013 11:35:44 -0700 (PDT) Received: from [172.20.0.41] (196-210-102-25.dynamic.isadsl.co.za. [196.210.102.25]) by mx.google.com with ESMTPSA id w19sm12744717wia.5.1969.12.31.16.00.00 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 01 Sep 2013 11:35:44 -0700 (PDT) Message-ID: <52238823.9060008@gmail.com> Date: Sun, 01 Sep 2013 20:32:03 +0200 From: Alan McKinnon User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130809 Thunderbird/17.0.8 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Can't ping remote system References: <522338F2.3030206@hadt.biz> <5223391D.6090905@hadt.biz> <52234FF3.7050309@gmail.com> <52237E83.9080206@gmail.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Archives-Salt: 2ea2ec5c-2199-4fd0-ab03-536fac8c15aa X-Archives-Hash: 8ad3c8d8df1347921c9bf2525c4822c7 On 01/09/2013 20:07, Grant wrote: >>>>>>>> My laptop can't ping my remote system but it can ping others >>>>>>>> (google.com, yahoo.com, etc). I've tried disabling my firewall on >>>>>>>> both ends with '/etc/init.d/shorewall stop && shorewall clear'. Could >>>>>>>> my AT&T business ADSL connection on the remote system be blocking >>>>>>>> inbound pings? >>> >>> I did 'traceroute -w 30 -I ip-address' several times and the last IP >>> displayed is always the same. I looked it up and it's an AT&T IP >>> supposedly located about 1500 miles from my machine which is also on >>> an AT&T connection. Does this tell me anything? >> >> Yes, it tells you that all hops up to that point at least respond to >> the kinds of icmp packets traceroute uses. The first hop that fails to >> answer isn't answering. >> >> You are looking for possible reasons why icmp might not be working out >> properly - that router is your first suspect. Admittedly, it might be >> blocking traceroute pings and still allow the responses you seek, but >> you have to start somewhere :-) > > So the culprit is the first IP that should appear in the list but > doesn't? If so, how is that helpful since it's not displayed? This is where it gets tricky. You identify the last router in the list for which you have an address or name, and contact the NOC team for that organization. Ask them for the next hop in routing for the destination address you are trying to ping and hope that they will be kind enough to help you out. -- Alan McKinnon alan.mckinnon@gmail.com