No EBay but all else connects through Linksys router

[Vernon Brown_4]

I recently changed internet access from my LAN from a PC-switch hub acting as a router to a Linksys wireless router, both configs to the same DNS CenturyTel modem. Everything seems to work fine; all PC's on the LAN have internet access to every web site we have tried except no PC on the LAN can connect to EBay.

Ping to www.ebay.com works from all PC's.

From my workstation on the LAN runing FC3 with Firefox browser attempting http://www.ebay.com/ through eth1 LAN access shows it successfully resolving the DNS, then the status bar shows "wating for " several ebay redirect pages until it finally times out with "Document contains no data"

From my same work station, accessing the internet through a cable modem on eth0 http://www.ebay.com, same browser, works fine, no problem.

I've checked the router config and opened up everything I could find that might be restricting web site access.

Does anyone have a clue about what might be going on here.

Thanks for any help !!

[Florian Heigl (new acc)]

Would You like to take some steps to get closer to the issue?

on the FC3 box -
- call wget with the 'document contains no data url' (then look at the result with lynx or firefox - still nothing inside?
- reduce Your lan interfaces' MTU and MRU to ... say... 1460 bytes
- repeat the request after this

[Florian Heigl (new acc)]

uhm, and before I forget it - try to delete firefox' browser cache and cookies, too
(just to have the easy things checked)

[Vernon Brown_4]

I used dig with www.ebay.com and got a list of several url's.

wget on the first connects quickly, then after spewing a couple pages of data quits with the following error.

06:42:23 (203.42 B/s) - `page_not_responding.html?eBayErrorEventName=p4kjkbsdab`jtb9?td.s5os575-2005.09.14.04.40.37.674.PDT' saved [8,784/8,784]

I'll try the others.

[Vernon Brown_4]

Tried the MTU - MRU change to 1460 and SUCCESS !!

It works; do you know if there is a way to determine the optimum MTU - MRU setting ?

veb

[Florian Heigl (new acc) · Accepted solution]

two ways:

1.
look into PathMTUDiscovery, I don't know where it's implemented in linux, but surely there's something

2. (this is essentially what path mtu does, too)
set MTU=1500, MRU=1500
ping an external host:

set options to 'dont fragment' (might be default) and increase the 'length' from 1460 to 1500 in 1byte increments.

after that's done, set both MTU and MRU to that value for almost optimal performance.

[Vernon Brown_4]

Thanks !!