Can't access local area server via internet IP

Question

The server has 2 IP.

192.168.1.30 for local area network.
220.2.2.2:8081 and http://website.com:8081 for internet visitors.

If I connect to 220.2.2.2:8081, it will show ERR_CONNECTION_REFUSED.

How can I access 220.2.2.2:8081 or http://website.com:8081 like visitors? I don't want to use 192.168.1.30. Edit my C:\Windows\System32\drivers\etc\hosts didn't work.