How to limit number of connection on spacific port

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  Hi Ramy,

  As far as I know, we can't limit the number of connection on a specific port by Windows Server itself.

  You may try to use Microsoft Forefront Threat Management Gateway.

  Here is an overview of flood mitigation,

  Overview of flood mitigation

  http://technet.microsoft.com/en-us/library/cc995196.aspx

  If you have any question about Forefront TMG, please post your question on the forum below,

  http://social.technet.microsoft.com/Forums/forefront/en-US/home?forum=Forefrontedgegeneral

  Hope this helps.

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  Steven Lee

  TechNet Community Support

  

  • Marked as answer by Steven_Lee0510 Sunday, August 10, 2014 5:11 AM

  Monday, August 4, 2014 7:08 AM
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  If this is a web application, I recommend server 2012 R2 where you have fine control in IIS 8.5 on limiting concurrent connections per source IP or subnet

  If net, you can edit this reg key:

  [HKEY_LOCAL_MACHINE \System \CurrentControlSet \Services \Tcpip \Parameters]
  TcpNumConnections = 0x00fffffe (Default = 16,777,214)

  This limits the maximum number of connections that TCP may have open simultaneously on the server. This is not per port though.

  You can also edit this key:

  [HKEY_LOCAL_MACHINE \System \CurrentControlSet \Services \Tcpip \Parameters]
  MaxUserPort 

  This changes the default range for dynamic ports which is 49152-65535, which makes available 16,384 outbound concurrent connections for each IP Address. Again not port specific.

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  samb

  • Proposed as answer by Sam Boutros Friday, August 8, 2014 12:44 PM

  Friday, August 8, 2014 12:44 PM