Which is the default TCP connect timeout in Windows? There is a registry key to configure it or it's set dynamically?
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In Windows the value is dynamic for established conections, though the default for initial connections is 72 seconds. The Registry settings are defined in this article: http://technet.microsoft.com/en-us/library/cc739819(WS.10).aspx HKEY_LOCAL_MACHINE \SYSTEM \CurrentControlSet \Services: \Tcpip \Parameters TcpInitialRTT: Defines what the initial time-out settings are for new connections. This number in seconds is doubled each time it retransmits before timing a connection out. Defaults to 3. TcpMaxConnectRetransmissions: Defines the number of retransmissions before timing a connection out. Defaults to 5. | |||
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TcpInitialRTT and TcpMaxConnectRetransmissions may not be present in Vista and Windows 2008. This Microsoft document does not include them. http://download.microsoft.com/download/c/2/6/c26893a6-46c7-4b5c-b287-830216597340/TCPIP_Reg.doc And this says at least TcpInitialRTT is gone, although I don't know how reliable it is. http://pul.se/Blog-Post-TCP-IP-Stack-hardening-in-Operating-Systems-starting-with-Windows-Vista_SharePoint-kHPTTCP0WJ5,7zq00hH0wINE | |||
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