I'm not sure what the issue is, but I have a suggestion that could help you;
1. Turn off your Firewall.
2. Install a new, trustworthy, Firewall.
3. Add an exception for the files.
4. Run said programs and see if it works.

Good luck!

So after a couple of months I can finally play AoS again because I bought a new PC. But I do need some quick help with my Firewall.

I can play when I just turn the entire Firewall off, but I'd rather not have to keep turning it off and on to play. I tried doing the "allow programs" thing on the Firewall settings, and added the AoS client.exe, server.exe, and voxel.exe in the AoS folder. But I get connection errors when I turn the firewall on.

What am I doing wrong here?

Thanks so much!