Windows 2003/2008 and Tcpip\Parameters

Hi there,

In some of our Windows 2003 builds we tweaked a number of registry values
(for performance/security/etc reasons) under the key
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Tcpip\Parameters]. The
specific ones we added were,

DisableIPSourceRouting
EnablePMTUDiscovery
KeepAliveTime
TcpMaxDataRetransmissions
TcpTimedWaitDelay
EnableDeadGWDetect
SynAttackProtect
TcpMaxConnectResponsereTransmissions
MaxFreeTcbs
MaxHashTableSize
MaxUserPort
TcpMaxDupAcks
EnableSecurityFilters
SackOpts
TcpWindowSize

We are moving to using Windows 2008 builds and have been evaluating these
tweaks to see,

1. Do we still need them?
2. Are they supported in Windows 2008?

So during this process we have reviewed the following document titled
"TCP/IP Registry Values for Microsoft Windows Vista and Windows Server 2008"
downloadable from
"http://download.microsoft.com/download/c/2/6/c26893a6-46c7-4b5c-b287-830216597340/TCPIP_Reg.doc".

In this document we can see that the following values are still supported in
that registry node,

DisableIPSourceRouting
EnablePMTUDiscovery
KeepAliveTime
TcpMaxDataRetransmissions
TcpTimedWaitDelay

However the others (listed below) are not mentioned in the document and its
proving to be difficult to find an equalvilent registry value or other
setting under Windows 2008,

EnableDeadGWDetect
SynAttackProtect
TcpMaxConnectResponsereTransmissions
MaxFreeTcbs
MaxHashTableSize
MaxUserPort
TcpMaxDupAcks
EnableSecurityFilters
SackOpts

We have found out that one of the settings (listed below) is no longer
needed in Vista and Windows 2008, we just need to find answers for the others.

TcpWindowSize (no longer need
URL: http://technet.microsoft.com/en-nz/m...19(en-us).aspx
EXTRACTS: To optimize TCP throughput, especially for transmission paths with
a high BDP, the Next Generation TCP/IP stack in Windows Vista and Windows
Server 2008) supports Receive Window Auto-Tuning....etc....and IT
administrators no longer need to manually configure a TCP receive window size
for specific computers.

If anyone can advise a support document listing these or help shed some
light on ways to achieve the same setting under Windows 2008 we would be
interested in hearing about them...thanks...Matt D