From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: Fw: [Bug 36122] New: New cache learned PMTU information in inetpeer causes ssh to fail when tunneled via an IPSEC VPN Date: Wed, 8 Jun 2011 08:43:04 -0700 Message-ID: <20110608084304.358d5970@nehalam.ftrdhcpuser.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: David Miller Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:40305 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753404Ab1FHPnM (ORCPT ); Wed, 8 Jun 2011 11:43:12 -0400 Sender: netdev-owner@vger.kernel.org List-ID: Begin forwarded message: Date: Sat, 28 May 2011 21:50:29 GMT From: bugzilla-daemon@bugzilla.kernel.org To: shemminger@linux-foundation.org Subject: [Bug 36122] New: New cache learned PMTU information in inetpeer causes ssh to fail when tunneled via an IPSEC VPN https://bugzilla.kernel.org/show_bug.cgi?id=36122 URL: http://bugs.gentoo.org/show_bug.cgi?id=369025 Summary: New cache learned PMTU information in inetpeer causes ssh to fail when tunneled via an IPSEC VPN Product: Networking Version: 2.5 Kernel Version: 2.6.39 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: IPV4 AssignedTo: shemminger@linux-foundation.org ReportedBy: blueness@gentoo.org CC: kernel@gentoo.org Regression: No When trying to ssh from a box running 2.6.39 on one private subnet to another box on another private subnet via an IPSEC vpn, ssh freezes and times out at: debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP This was traced down to commit 2c8cec5c10bced2408082a6656170e74ac17231c. This type of error is known to occur when there is fragmentation due to mismatched mtu's which the commit addresses. Notice the problem does not occur when ssh-ing directly, ie not via an IPSEC tunnel. I have not tested if other tunnels are affected. Please see the downstream bug for more details. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.