Windows 7 and Windows Server 2008 have improved the old Windows SMB1 protocol; for more information read this: Wikipedia SMB2
The registry patch applies the following changes:
- Sets the SMB file buffer to 64KB and must be applied with the TcpWindowSize change further down.
- The next two lines tells Windows Servers to disable security signing on each packet. This is an enormous factor for Domain Controllers. Corporate network admins must carefully evaluate the cost/benefit of this change.
- Tcp1323Opts allows the TCP receive buffer to dynamically scale for better performance. This is useful for all internet traffic. Do not set this to 2 or 3 as time stamp generation adds a lot of overhead to each packet.
- TcpWindowsSize is set to 1MB as a default and is required to allow SizReqBuf to work correctly!
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters]
"SizReqBuf"=dword:0000ffff
"requiresecuritysignature"=dword:00000000
"enablesecuritysignature"=dword:00000000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
"Tcp1323Opts"=dword:00000001
"TcpWindowSize"=dword:00100000
