Problems with ping and MTU

[mixalissen]

I tried to ping a site with ping www.expedient.net -f -l 1492 to see if the packets sent, need to be fragmented in order to later adjust the MTU. I lowered the packet size, as advised but in packet size 1472 I get a request timed out. I tried the -t, but I get the same result.Any ideas? How can I find the proper packet size in order to find out the best MTU for me?

[Ghost_Hacker]

The -f set the packet to not be fragmented. So when your packets reached a link with a smaller MTU ,then what you sent, the packet was "rejected" because it could not be fragmented.

There is no "proper" MTU for your packets as they move across the internet. Different links may have different MTUs and a packet may not use the same link each time it goes to any one site or server on the internet this is just the way it is.

You can however use the max MTU for your local segment. This link (http://www.pctools.com/guides/registry/detail/280/) should help.

Good Luck :)