From owner-freebsd-net@FreeBSD.ORG Tue Jan 6 14:04:31 2004 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F37A916A4CE for ; Tue, 6 Jan 2004 14:04:30 -0800 (PST) Received: from pit.databus.com (p70-227.acedsl.com [66.114.70.227]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6ADEB43D2F for ; Tue, 6 Jan 2004 14:04:29 -0800 (PST) (envelope-from barney@pit.databus.com) Received: from pit.databus.com (localhost [127.0.0.1]) by pit.databus.com (8.12.10/8.12.10) with ESMTP id i06M4PcW010169; Tue, 6 Jan 2004 17:04:26 -0500 (EST) (envelope-from barney@pit.databus.com) Received: (from barney@localhost) by pit.databus.com (8.12.10/8.12.10/Submit) id i06M3VGE010160; Tue, 6 Jan 2004 17:03:31 -0500 (EST) (envelope-from barney) Date: Tue, 6 Jan 2004 17:03:31 -0500 From: Barney Wolff To: tomt@callcds.com Message-ID: <20040106220331.GA10061@pit.databus.com> References: <38738.12.217.87.137.1073424025.squirrel@mail.callcds.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <38738.12.217.87.137.1073424025.squirrel@mail.callcds.com> User-Agent: Mutt/1.5.5.1i X-Scanned-By: MIMEDefang 2.39 cc: freebsd-net@freebsd.org Subject: Re: IPENCAP Problem X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Jan 2004 22:04:31 -0000 On Tue, Jan 06, 2004 at 04:20:25PM -0500, tomt@callcds.com wrote: > The problem > I have 5 buildings that are connected via point-to-point wireless. The > cost of dedicated lines within this town were so high that wireless was an > excellent option. The wireless is in place and working however we are > going back to secure the wireless cloud so that it cannot be used by > unauthorized people. The internet connection for all buildings is located > at Building A so all machines need to route across the wireless to the > internet. > > The solution > 5 PCs running FreeBSD 5.1-Release using 2 network cards apiece and running > IP-ENCAP between nodes with the tunnel being encrypted with IPSEC. > Routing on each gateway that sends its traffic to the headend at Building A > > I have all this working except for this problem > The PROBLEM > Certain websites are not accessible > sears.com > msnbc.com > microsoft.com > drudgereport.com > > Other websites will work normally > freebsd.org > slashdot.org > ebay.com > > What seems to be the problem > Each of the websites that I listed have round-robin DNS enabled and have > multiple A records for the website I'd suspect MTU issues rather than multiple A records. Try setting the MTU of the link to the Internet to 1400. If that works you can fine tune it. -- Barney Wolff http://www.databus.com/bwresume.pdf I'm available by contract or FT, in the NYC metro area or via the 'Net.