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I have just cut out up ranges that can not connect. I am blocking USA, Asia and Middle East to prevent most malicious accesses

Blocking most of the world's population is one way of reducing malicious traffic

Make sure to block your own IP address to minimize the chance of a social engineering attack.

Include 127.0.0.1 as well just in case they get into the server.

The server I have not built yet is my most secure one yet!

If nobody can connect to your site, it’s perfectly secure.