If you are the only PC, do not expect to be able to connect to yourself through the internet.

The only way to test is let a remote PC connect to your IP, or place the server on a remote IP.
My current project is working fine locally and on a remote server, but not if I try to connect to myself through the external IP.
To connect through external IP you need at least 2 computers in your network, of which one is forwarded.
This has nothing to do with Anet or 3DGS, its a internet issue.