[90175] in North American Network Operators' Group
Re: Strange network problem accessing Ebay and versiontracker websites
daemon@ATHENA.MIT.EDU (Warren Kumari)
Wed May 3 17:40:46 2006
In-Reply-To: <7899B5430508724591327703A21F05C103669F@svr-EXCH-rch.dna-communications.office>
Cc: <nanog@merit.edu>
From: Warren Kumari <warren@kumari.net>
Date: Wed, 3 May 2006 14:38:25 -0700
To: "Shane Owens" <shaneowens@dna-communications.com>
Errors-To: owner-nanog@merit.edu
Sounds a whole bunch like you have a PMTUD (Path MTU Discovery) issue.
Change the MTU on a host to be smaller and see if this fixes the
issue... If it does, there are a bunch of networking tricks you can
play to fix it for all of the customers. MSS rewrite is one,
clearing the DF BIt on all packets is another -- these are various
version of icky...
W
On May 3, 2006, at 2:22 PM, Shane Owens wrote:
>
> All, I know this probably isn't the best forum for this question
> but I'd
> like to rule out a network problem before I tell a customer he has
> a PC
> problem. I run a small CLEC network that is single homed to BTN for
> transit. I have 3 sites all interconnected via DS3's and provide DSL
> services from each site. From anywhere on my network we have problem
> with Ebay and versiontracker.com but only on certain browsers. IE
> on a
> windows machine can access these sites without any problems, but
> Firefox
> on the same machine cannot open the websites (Ebay can be opened with
> addblocking software installed). On a Mac the only browser that works
> for these sites is Opera. With this knowledge I would say it is
> something with the coding on the website, but if I take the same
> machine
> and connect it to another network other than mine (Verizon, SBC and
> local municipal wifi have been tested) everything works fine.
>
> Can anyone give me any suggestions as to what routes to take to
> troubleshoot this? Logic tell me that is I have reach ability and one
> browser work but another doesn't it's a software problem with
> either the
> browser or the site, but being able to take the same machine to
> another
> network and have it work points to a whole different problem.
>
> Could this be a MTU issue?
>
> Shane Owens
> DNA Communications Inc
> 601 1st Ave
> Rochelle, IL 61068
> work (815)562-4290 ext 201
> mobile (815)793-3822
>
--
"He who laughs last, thinks slowest."
-- Anonymous
