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Users have noticed that the SPI setting seems to affect the maximum TCP window size. Follow these suggestions provided by joe_dude See Profile. Note: Always consider performaing a backup or creating a Restore Point before editing the Registry.

1) On the router, disable SPI under Advanced -> Firewall.

2) In Windows 2000/XP/2003, add/change the value DefaultReceiveWindow in HKEY_LOCAL_MACHINE -> SYSTEM -> CurrentControlSet -> Services -> Afd -> Parameters to greater than 65535. You may also want to increase DefaultSendWindow as well.

I recommend matching DefaultReceiveWindow to GlobalMaxTcpWindowSize in HKEY_LOCAL_MACHINE -> SYSTEM -> CurrentControlSet -> Services -> Tcpip -> Parameters.

Feedback received on this FAQ entry:
  • can i know exact procedure in windows xp.

    2012-10-30 09:14:28

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by joe_dude See Profile edited by funchords See Profile
last modified: 2005-09-23 13:18:34