I installed Openvpn-As on my Ubuntu 20.04 server and used default settings for everything. I tried connecting to my VPN using the OpenVPN client on mobile locally and it works with no issues.
I was now trying from the outside. I enabled port forwarding on my router and opened the following ports: 943, 443, 1194. But it did not work, it kept connecting until a time-out message appeared. I used a port checker service (https://portchecker.co/) and it shows that 1194 is still the only closed port I need.
Then I used ufw
to enable each port individually and reload it afterward. But it didn't solve the issue.
I tested that I can externally connect to the server with SSH (22) and had no trouble with that, so my server is reachable at least...
Here are some screenshots of my Port Forwarding configuration and ufw.
Used Router = ZTE ZXHN F680
I hope my question is clear to you! I will modify the post if needed for any further clarification.