From owner-freebsd-questions@freebsd.org Wed Sep 11 10:38:45 2019 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id BC143F6D40 for ; Wed, 11 Sep 2019 10:38:45 +0000 (UTC) (envelope-from 76nemo76@gmx.ch) Received: from mout.gmx.net (mout.gmx.net [212.227.17.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "mout.gmx.net", Issuer "TeleSec ServerPass Class 2 CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46Sz045Lc0z3GTb for ; Wed, 11 Sep 2019 10:38:44 +0000 (UTC) (envelope-from 76nemo76@gmx.ch) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1568198318; bh=lJrQ33jN3waE7DKjrIbk4RZ72SqbmU7ADegFHMaMRLQ=; h=X-UI-Sender-Class:Date:From:To:Cc:Subject:In-Reply-To:References; b=cZZ5pQBf0kF4IlTbiZUO3PtsNVcQKsRthD+xwDxMChuImYvb2rmH+XcS5HECYHcaE dcSOsDQOxudp1L4wuuzf6mgwmNyoKiCIZhV17M9eXJENjmk2y9o5/+qukIXTiB20fJ iR92YQAp+KNMCbD9tAnhBXjw4HLbGUSBPWQCPFkQ= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from virtualisation ([85.195.219.254]) by mail.gmx.com (mrgmx101 [212.227.17.168]) with ESMTPSA (Nemesis) id 0LeiJ8-1iTLs81f8o-00qRsV; Wed, 11 Sep 2019 12:25:26 +0200 Date: Wed, 11 Sep 2019 12:25:23 +0200 From: Pierre Dupond <76nemo76@gmx.ch> To: Matthew Seaman Cc: freebsd-questions@freebsd.org Subject: Re: ping6 www.freebsd.org hangs Message-Id: <20190911122523.9b94cd45533279bf46592e94@gmx.ch> In-Reply-To: References: <20190906192931.d5735e1602f98d6b9a2906c0@gmx.ch> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.30; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:7Zjgw2hoeiwc5X9OMQ0KRO4TXQADVVnUsh/4z1rSihJnsrVHWbg 7AZzquM7xaCug4lUFmyNFw5ObkyTBKJteJxCQpYQnRYru08SfyE8Y+eZCSdnM9s0ROJGyi2 C3NHwGMjMnq7JGdlvZAAB6DeOXxiEtekGVxrYrwHIEBtLIAQ6Uhwap7ZoacBWTWbnbqHIRQ 1yiO5+P/60UwHgLhLMZbA== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:y02uuYpp3G8=:zSBgfFawG1dKyRZv8cQzqp NXqE3dFaV4YP2hpdkminTdQyPj/tUt6MAfPXzvmaCEXI5vc3f8M8jT0XWQo/t5asBeahrlNlf moS1W2zMmWiiF6eOJPC7eASphTAIVfre9EqXmbzkvjRPPm+YwLStEmnRBYFxbQfbbRHF24HZm jGXf+YWht42CbCciABnOpchojlhwuySRkZ0b7maq3LgyGRtrmlvqFsHYsl55Qrwjst7XVuDUd EyMfpndNrO7/lmDC2WvaGrzPb221u7Ci3BJtPQfky8Rb6X5GhP2n6dU2G8zVp+SUTnOWhSL+h WeyTwSAubi3aImiAYGPW0ettpE6UKVeZT1IaSikz0jUqR6hYRpBzwqT6bBLt0xHBdye3k1Wqb ITwaFDNTeE/j5m5RmBFansMvaCEwEJq7MikMkOv2bAM1g/tMNkuDpWRI9x697eSfyYd8k1M6S nA8Kt690hD3dvz5kMLgkmpeDcU7XcCrSRIM1BDz0EnSv98Id6OmcITFUereaAWBYIdk5JDeyb MWw4aTSvJ3bDvu3Ztnsfw6bdqU49UynggrAYBDLbkhfiw2jaN6n6QXNZK/8mO4pGuoVerqeCI PFVco0S21GaA2NWsL5beY5BVbPZbu/skyPioqu+p6e/tEFt9nYLS18W9HmqyzuPlZ3lgJJPDa jggB556sMDbZQkerYhmsZQhNlaQhrZEbTAh2hBm7xVkXpYFUBWWbFYCmTwcH9QwtGEnI9GIRd 23gXDUjjyT7AcyMGtKTPdQMSciUsOVKPoq/nn0iBIijnUDbRG9oEPJVDY8FFGNb6TUEcVK21V Ozhsx3r0odxeZemBrZtKqXpTIiZMMSHg2juEqclBSL/2oyhTwEDnPVt6G/fa6iNGW/TzkuTa6 oc2spb31lPX8df7UTd9HEa9i3yFgcj6AoXR52sjmK/Nd3JrILxQLhdmXL+gr9kw+ScYQpEZNs ygjMUIj50PpAgJzfU3U0fj6LSe9LcI3vyRTiW8wv+ZAASnY8I+10587RN7bsQnLacl31yqTUN hgmU/ioPU7feQyOyDX9jkHTR8oxEZpfQ18/J/x7q8wS9pAgWeY3SCye7+EUQUolUwo7qyAyog tRa3ff9ziFjNfrHyCsHTLEMQTrD3lR9RBYZDl9PAVvk9xGyHkUb3iqIPZjCM1j5hk6Nt1qKiw YzJaD8rz98TyejvM2q4ZSQlz8z+NL+2KBM+YK26mCTkHalkiFJ2pOlF45ySR+NXsxOosPl/y5 ErqBnJJNEBqZxxkJDzSsHPFfWaQWFJJZWMqkAS5m8SkEJ7y6uiHxfvT9+QNc= X-Rspamd-Queue-Id: 46Sz045Lc0z3GTb X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmx.net header.s=badeba3b8450 header.b=cZZ5pQBf; dmarc=none; spf=pass (mx1.freebsd.org: domain of 76nemo76@gmx.ch designates 212.227.17.20 as permitted sender) smtp.mailfrom=76nemo76@gmx.ch X-Spamd-Result: default: False [-2.10 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[gmx.net:s=badeba3b8450]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:212.227.17.0/27]; FREEMAIL_FROM(0.00)[gmx.ch]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; DMARC_NA(0.00)[gmx.ch]; IP_SCORE_FREEMAIL(0.00)[]; MV_CASE(0.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[gmx.net:+]; RCPT_COUNT_TWO(0.00)[2]; IP_SCORE(0.00)[ip: (-6.42), ipnet: 212.227.0.0/16(-1.38), asn: 8560(2.15), country: DE(-0.01)]; RCVD_IN_DNSWL_LOW(-0.10)[20.17.227.212.list.dnswl.org : 127.0.3.1]; FROM_EQ_ENVFROM(0.00)[]; FREEMAIL_ENVFROM(0.00)[gmx.ch]; ASN(0.00)[asn:8560, ipnet:212.227.0.0/16, country:DE]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Sep 2019 10:38:45 -0000 Thanks for the tip. Finally I was able to reproduce the problem (which arise from time to time). The ping6 command failed either with the IPv6 address (or the name). The result is the same for an other address (like google) but at the same time I can reach these address from other machines. It is also possible to reach (with ping6) the external router of my organi= sation (passing few intermediate routers). What is curious however is that the command "traceroute6" succeed and then the command "ping6" works again. It sounds like a strange fragmentation problem. On Fri, 6 Sep 2019 20:07:24 +0100 Matthew Seaman wrote: > On 06/09/2019 18:29, Pierre Dupond wrote: > > Sometime when I try to pass the command > > "ping6 www.freebsd.org" or "ping6 www.google.org" on 12.0-RELEASE-p7 > > the ping hangs. But after a moment (perhaps 5 minutes), > > if the command is tried again it works. > > > > Do you get the same effect if you ping an IP number directly? eg. > instead of > > ping6 www.freebsd.org > > try: > > ping6 2610:1c1:1:606c::50:15 > > > If there is a difference, that suggests the problem is not actually with > the pinging, but with the DNS lookup to find the AAAA record of the host > you want to ping. > > Cheers, > > Matthew > =2D- Gmail <76nemo76@gmx.ch>