Kuro

Ok, here’s a strange one;

Lately I have been unable to access certain sites, or more specifically, certain aspects of sites. For example, I can get to eBay, but can’t search… I can get to hotmail, but can’t login – the pages just time out.

I can’t even post to a forum, I can see and read, but cannot post as the page times out!

At first I though this was some kind of security problem, https:\\ and all that – but I can get to my bank details as usual – so it doesn’t look like that’s the problem…

Any suggestions..?

Kieran_Burns

iTrader: (1)

You're not sat behind an ISA Server are you? (I only ask as we've been seeing this with clients on some of our networks recently as well)

Kuro

what's one of those then

I'm with BT broadband - just gone wireless, but that shouldn't make any difference should it..?

mike1210

errr MTU??? does it work ok with a wired connection to the router???

lightning101

I would agree - MTU probably set too high

Kuro

ok, that sounds possible - so, what's an MTU?

mike1210

taken from another site:

Short for Maximum Transmission Unit, the largest physical packet size, measured in bytes, that a network can transmit. Any messages larger than the MTU are divided into smaller packets before being sent. Every network has a different MTU, which is set by the network administrator. On Windows 95, you can also set the MTU of your machine. This defines the maximum size of the packets sent from your computer onto the network. Ideally, you want the MTU to be the same as the smallest MTU of all the networks between your machine and a message's final destination. Otherwise, if your messages are larger than one of the intervening MTUs, they will get broken up (fragmented), which slows down transmission speeds.
Trial and error is the only sure way of finding the optimal MTU, but there are some guidelines that can help. Most Ethernet networks, on the other hand, have an MTU of 1500, which is the default MTU setting for Windows 95.

mike1210

depends on what is causing the problem on where it would have to be changed, if it does the same on a wired connection then then you'd need to change it on the router, if it's on the wireless network only then it would need to be changed on the wireless card

Kuro

fixed - thanks guys! (upped the MTU to 1500 (from 1400) and no poblems)