According to frogboy's posts portforwarding can help alleviate connection problems with demigod multiplayer.

I've been fiddling with port forwarding for like a week now and still can't get it to work. As far as I understand you open a port in your router, then open it your firewall or just disable your firewall completely. However at canyouseeme.org I still get connection timed out on ports I attempted to open and connection refused on ports I did not. Is there any obscure things that could affect port forwarding? I'm going nuts trying to figure this out.

I have gone through portforward.com's step by step instructions, I've checked with my isp, they're not blocking anything, I'm not behind a double nat. I dont have any antivirus going on.

I have disabled windows defender, and the firewall, neither changed anything.