How do I know the UDP port I opened for the external network?

Enter netstat -na at the command prompt to see the available ports. You can open the port you need in the router. If you don't have a router, you can download the port mapping tool from the following website:/soft/soft/29712.htm.

The following ports are used by CS

The output port of UDP protocol is 270 10.

The output port of UDP protocol is 270 12.

The output port of UDP protocol is 27020.

The output port of TCP protocol is 5273.

The output port of TCP protocol is 7002.

Incoming port 270 15 of UDP protocol.

When you are a server, this port is the port specified by -port. If you not only open the server 270 15, but also open multiple servers such as port 270 16, then you have to open the port 270 16 of UDP protocol.

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