Try using this command (I'm using this): Code: netsh int tcp set global autotuninglevel=restricted in Command Prompt. You can also try: Code: netsh int tcp set global autotuninglevel=highlyrestricted but I have not tested it. Try not to use (Unless you want to see if it works on your server): Code: netsh int tcp set global autotuninglevel=experimental It disallowed connections to my server. It seems to help in the DC, no one DCed so far except for 1 guy. Well I'm yet to get statistics for the rest of tomorrow. Tell me if this fixes it. Note: I'm not 100% sure if it is this, it may be because I set my MaxHalfOpenTCP value and TcpNumConnections value to 9999999 and creating a DWORD called EnableConnectionRateLimiting to 0 in my registry also.