I'm trying to play Star Trek Armada with my friend using Radmin. When we're connected to each other's networks (or to the Star Trek Armada gaming server, doesn't seem to make a difference either way) we can see each other's games in the server list (in-game) but can't connect to them. We have tried disabling firewalls and changing app rules within firewalls but nothing changes. I can't adjust ports on my router either as it's provided by my ISP and I can't figure out any way to access its configuration
1. Add the game to firewall exceptions. open radmin vpn window - menu - system - add... and select your game.
2. Try to change metric of Radmin VPN adapter. Firstly, set it to 1. If it didn`t help, set it to 1500 or to the max value (you can read more here https://www.raymond.cc/blog/choosing-which-connection-to-use-with-windows-routing-table-editor-gui/).
3. Turn off firewall (local and remote) or open ports that the game you`re playing in is using on your local PC to establish connection.