From mboxrd@z Thu Jan 1 00:00:00 1970 From: bert hubert Subject: Re: TCP/IPv6 broken in Linux 2.5.64? Date: Tue, 18 Mar 2003 17:25:32 +0100 Sender: netdev-bounce@oss.sgi.com Message-ID: <20030318162532.GA9705@outpost.ds9a.nl> References: <20030318131104.GA16367@hensema.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@oss.sgi.com Return-path: To: Erik Hensema Content-Disposition: inline In-Reply-To: <20030318131104.GA16367@hensema.net> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org On Tue, Mar 18, 2003 at 02:11:04PM +0100, Erik Hensema wrote: > Hi, > > I'm trying to upgrade to Linux 2.5.x from 2.4.x. It seems to be working > fine, except for IPv6: a TCP session can be established, but I can't send > data. I can receive it though. I can confirm this. 2.5.65 can connect to other hosts out there, like ipv6 irc servers, or an IPv6 zonetransfer. However, when I try to ssh from 2.5.65 to another 2.5.65, nothing happens. 2.4.18 can also ssh to 2.5.65. So we have: to: 2.4.18 2.5.65 from: 2.4.18 OK OK 2.5.65 OK ERROR tcpdump from 2.5.65 to 2.5.65: 25.987220 hostA.33180 > hostB.22: S 2721590261:2721590261(0) win 5760 25.987490 hostB.22 > hostA.33180: S 2377513523:2377513523(0) ack 2721590262 win 5712 25.987622 hostA.33180 > hostB.22: . ack 1 win 5760 25.993273 hostB.22 > hostA.33180: P 1:41(40) ack 1 win 5712 26.193443 hostB.22 > hostA.33180: P 1:41(40) ack 1 win 5712 26.757236 hostB.22 > hostA.33180: P 1:41(40) ack 1 win 5712 The originating host does not ACK the received data, it appears. No IPSEC is involved with this. Regards, bert -- http://www.PowerDNS.com Open source, database driven DNS Software http://lartc.org Linux Advanced Routing & Traffic Control HOWTO http://netherlabs.nl Consulting