The default TCP window size on Windows Server 2008

settingstcpudpwindows-server-2008

What is the TCP (and UDP) default window size on Windows Server 2008? I think it's 1480 bytes, but I'm not sure.

Can it be changed? How?

Best Answer

Part of Vista and Server 2008 is a next-generation TCP stack... it's auto-tuned, so there is no more TCPWindowSize tweak.

As far as changing it, you can turn auto-tuning on or off with these commands...

netsh int tcp set global autotuninglevel=normal
netsh int tcp set global autotuninglevel=disable