Problem: Terminal Server Refuses New Connections
Error: Event Log Shows 'The terminal server received a large number of incomplete connections. The system may be under attack.'
Problem is caused by too many logon /logoff actions at the same time.
Obviously this could be caused by an attack but if you're like me, it was caused by too much activity at once.
Resolution:
In HKLM\System\CurrentControlSet\Control\TerminalServer , add the following DWORD value: MaxOutstandingConnect
You will need to add the value in hexadecimal format.
For Example:
50 is entered as 32 hex
75 is entered as 4b hex
Then reboot the server and your issue is resolved.
This has been tested and validated on the following OS's:
Windows Server 2008
Windows Server 2008 x64
Windows Server 2008 R2
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2 comments:
Hi Jacob,
Thanks for providing the resolution, as you have mentioned that the resolution works on 2008 but does that apply to windows server 2003 R2 SP2 as well? As i am getting the same issue on the above mentioned operating system.
Looking forward to hear from you.
It should work on that OS as well, just backup your registry setting first - just in case.
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