From owner-freebsd-net Mon Nov 26 17:57:58 2001 Delivered-To: freebsd-net@freebsd.org Received: from tomts7-srv.bellnexxia.net (tomts7.bellnexxia.net [209.226.175.40]) by hub.freebsd.org (Postfix) with ESMTP id 37F0037B491 for ; Mon, 26 Nov 2001 17:57:43 -0800 (PST) Received: from xena.gsicomp.on.ca ([199.243.149.34]) by tomts7-srv.bellnexxia.net (InterMail vM.4.01.03.16 201-229-121-116-20010115) with ESMTP id <20011127015741.LYZZ9080.tomts7-srv.bellnexxia.net@xena.gsicomp.on.ca> for ; Mon, 26 Nov 2001 20:57:41 -0500 Received: from hermes (hermes.gsicomp.on.ca [192.168.0.18]) by xena.gsicomp.on.ca (8.11.1/8.11.1) with SMTP id fAR1nSW54983 for ; Mon, 26 Nov 2001 20:49:29 -0500 (EST) (envelope-from matt@gsicomp.on.ca) Message-ID: <004801c176e6$e57a2eb0$1200a8c0@gsicomp.on.ca> From: "Matthew Emmerton" To: Subject: Very strange network behaviour - can anyone help me analyse tcpdump output? Date: Mon, 26 Nov 2001 20:57:38 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Hi all, In the continuing saga of IPSec over PPPoE for a retail POS environment that I'm maintaing, the problems seem to become more complex as time goes on. The network is quite simple: [ LAN #1 ] - [ FreeBSD Gateway #1 ] - [ ISP ] - [ FreeBSD Gateway #2 ] - [ LAN #2 ] Both LANs connect using PPPoE with the same ISP, and are one hop apart (according to traceroute). The problem is that a connection from the Internet (anywhere) to either of the FreeBSD gateways will "hang". Usually I can login but doing an 'ls -al' will display a few lines of text and then nothing. This happens using a bunch of telnet clients (Anzio on Win2K, Win2K and Win95 native, FreeBSD) from various ISPs, as well as *between* the gateways, so the problem is most definitely related to the ISP providing us service. However, they seem to think that it's our problem ("none of the customers that use Windows have this problem -- must be that Unix thing that you're using"). I have an ethereal trace of a hanging telnet session from my desktop to one of the gateway machines, and the corresponding tcpdump trace of the same session on the gateway. Since I'm not too familiar with TCP/IP at such a low level, I was wondering if anyone would be willing to take a look at the two dumps and see if there is anything strange going on. Thanks, -- Matt Emmerton To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message