Can't access certain websites

dwaviation · Jan 27, 2007, 19:26:02

Hmm My very old speedtouch is in fact an old Voyager 100, what a pain in the aris to setup that is. I shall wait until I get into work tomorrow and try the dodgy sites over the works wifi network.

Thanks for all your interest chaps - mighty impressed with idnet and the forum support so far.

MoHux · Jan 27, 2007, 19:32:30

Could this be any help?

One common problem that rears its head again and again on forums is the inability for users to view certain sites, in particular Microsoft sites, hotmail and ebay. Quite often this is the result of an MTU problem.

What is happening?

When your PC requests data from these sites, they use something called Path MTU Discovery to check what size packets to send back to your PC. If the site is unable to check what size packet to send it uses the default MTU of 1500 (for windows PCs). However there are there are certain gateways/routers on the Internet which use a smaller MTU, therefore the packets are too large to be transmitted and are rejected or dropped.

It is the job of Path MTU Discovery to find and report the smallest MTU setting between your PC and the remote site, so that the remote server sends out the correct sized packets.

What can I do to correct this?

You need to lower your MTU settings and/or make sure that Path MTU Discovery is working properly.

With thanks to Kitz.

dwaviation · Jan 27, 2007, 20:31:11

Good info - BUT - How does one alter the MTU settings?

Googling as we speak

stevelondon · Jan 27, 2007, 20:43:07

Usually routers default at 1500 but if it was your MTU that was causing it you would be having trouble with a lot more sites by whats been said here the problem certainly seems to be your router.

MoHux · Jan 27, 2007, 21:44:45

Quote from: dwaviation on Jan 27, 2007, 20:31:11
Good info - BUT - How does one alter the MTU settings?

Googling as we speak

You look here

Inactive · Jan 28, 2007, 09:41:17

This may also help...

http://www.pengbo.co.uk/ppages/tweaks.shtml

It does mention, some sites not opening.. etc.

dwaviation · Jan 28, 2007, 23:39:16

Well, have taken laptop to work today and can access everything thru the Netgear DG834G (V2). So guess what I have just ordered from eBay? It just so happens that BT Voyager 2100s are fetching around £25 as well - Bargain, but take my advice don't touch mine with a bargepole.

stevelondon · Jan 29, 2007, 00:50:57

Let us know how you get on with it hope it solves your problem.

Inactive · Jan 29, 2007, 12:34:15

Quote from: dwaviation on Jan 28, 2007, 23:39:16
Well, have taken laptop to work today and can access everything thru the Netgear DG834G (V2). So guess what I have just ordered from eBay? It just so happens that BT Voyager 2100s are fetching around £25 as well - Bargain, but take my advice don't touch mine with a bargepole.

Good luck with the Netgear, let us know how you get on.

dwaviation · Jan 31, 2007, 13:37:24

Brand new Netgear, £30 from eBay and problem solved - and with my new 'Rock CTX Xtreme Pro' being built as we speak, we're cooking on gas...

Inactive · Jan 31, 2007, 14:16:12

Brilliant news, thanks for the update..

stevelondon · Jan 31, 2007, 14:24:24

Glad you got it sorted