Port Forwarding Problems

First, thank you for taking the time to read through my problem. I appreciate any help or guidance i can get at this point, but to my problem.

I recently started the 60 day trial of the secureline to see if its something that i want to add to my avast package. I found this while trying to set up a dedicated server for me and my friends to play on. This game is Starbound and the port i was trying to set up was 21025, my router is completely set to work with the forwarding and my firewall has the exception but is blocking the dreaded scvhost.exe. So to make sure i can pinpoint where the problem is coming from i first turned the firewall off after installing the VPN and now its not working. I turn the VPN off and then the port is open, turn it back on and the port is closed (the website i am using is, portchecker.co). I have been looking through the forum to try and find a solution, and the only thing i have read is that the VPN shouldn’t be blocking the port. So now i am at a loss for both problems, and i am unsure of what to do or where to go. Once again i appreciate help or guidance that i can get, thank you for your time in reading this.