Last year, the server was always attacked. After every time it went online, the people who went online hurried off work and forgot to close some ports. As a result, the server was compromised once. Serious losses.
It should be noted that different computers and different CPUs create different threads at most each time. There may be too many threads created and an error will be reported. So if an error is reported, modify it yourself. The number of each scan is cut into smaller ones. The segment is fine, or you can set the seek time longer to ensure that the ports between 0-65536 can be scanned again.