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
January 25, 2023 at 7:28 amFAQParticipant
We 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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