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When DirecPC software is loaded on Windows 2000, it creates a registry key called GlobalMaxTcpWindow and sets your RWIN there. DrTcp sets the RWIN at a key called TcpWindowSize. Unfortunately, the "Global" key takes precedence, so changes you make with DrTcp have no effect. You have two options for fixing the problem, both requiring direct editing of your registry with Regedit. You can either manually reset the RWIN at the "Global" key, or you can delete the "Global" key after which your DrTcp changes will have full effect. The key is located at HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/Tcpip/Parameters. Open the Parameters folder and find the key GlobalMaxTcpWindow. Then, either manually change the RWIN there or delete the key so that you will be able to set the RWIN with DrTcp.

Feedback received on this FAQ entry:
  • i got up to tcpip but didnt see any file saying parameters in my folder

    2008-08-02 13:40:37

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by PetDude See Profile edited by JMGullett See Profile
last modified: 2007-02-21 16:29:54