Date: Tue, 6 Jan 2004 17:03:31 -0500 From: Barney Wolff <barney@databus.com> To: tomt@callcds.com Cc: freebsd-net@freebsd.org Subject: Re: IPENCAP Problem Message-ID: <20040106220331.GA10061@pit.databus.com> In-Reply-To: <38738.12.217.87.137.1073424025.squirrel@mail.callcds.com> References: <38738.12.217.87.137.1073424025.squirrel@mail.callcds.com>
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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.
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