Error:: Could not connect to any license server. The server is down or is not responsive” No buffer space available, maximum connections reached due to ephemeral port exhaustion
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January 25, 2023 at 7:28 am
FAQ
ParticipantWe recommend increasing to 65534 ports, and lowering the recycle timer as you have now done, in order to both allow for more ephemeral connections as well as a faster recycling of unused connections. Start Registry Editor. Backup the registry Browse to, and then click the following key in the registry: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpipParameters On the Edit menu, click New, DWORD Value, and then add the following registry value to increase the number of ephemeral ports that can by dynamically allocated to clients: Value name MaxUserPort Value data
On the Edit menu, click New, DWORD Value, and then add the following registry value to reduce the length of time that a connection stays in the TIME_WAIT state when the connection is being closed. While a connection is in the TIME_WAIT state, the socket pair cannot be reused: Value name TcpTimedWaitDelay Value data Close the Registry Editor. Reboot the machine for the changes to take effect Confirm the changes after the restart using this command: netsh int ipv4 show dynamicportrange tcp
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