Generally, it is to check which ports are open, and naturally close them if they are not open.

View the open port generally has the following methods:

1. Enter: netstat -an at the command line.

2. Use an ice sword, that is, an ice blade

3. Active port, also known as port

4. Super scanning

You haven't heard of its name, have you? 1 in pure port scanning software is fast, so you can specify the scanning port. Needless to say, this is an absolutely necessary tool.

The answer to this question is what I saw in others!

I hope I can help you!

Ha ha!