Windows limitation on number of simultaneously opened sockets/connections per machine

Question

Let\'s say I have Windows 7 with one real network interface and few loopback interfaces. I have IOCP enabled server that accepts connections from clients. I\'m trying to sim

Answer 1

I have found on some Microsoft page that:

... HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\MaxUserPort registry subkey is defined as the maximum port up to which ports may be allocated for wildcard binds. The value of the MaxUserPort registry entry defines the dynamic port range...

So, if I force the endpoint to use a certain port, e.g.

IPEndPoint bindEndpoint = new IPEndPoint(IPAddress.Parse(args[0]), 54321);

Then I can open more than 64K simultaneous sockets in the system.