![]() You can test it with this website IP address from your phone with wifi turned off so that you will be coming from the outside. There are a number of ways that you can test it. In this example I'll use the default openvpn port 1194. Now run this command to test the port you want to verify is not being blocked by your ISP. You can do this with netcat from the repository. The method you used for testing your ports is not an indication that they are blocked by your ISP.įirst, attach an application to listen on the port you want to test. Tcp LISTEN 0 128 :22 :* users:(("sshd",pid=852,fd=4))įrom the above it can be seen that OpenVPN is using UDP port 1194 (in this particular case). Netid State Recv-Q Send-Q Local Address:Port Peer Address:Port You can find out what port OpenVPN is running on by running: $ sudo ss -plntu If you used the default OpenVPN server configuration, you'll have to forward UDP port 1994 to the IP address of your Ubuntu 18.04 server. ![]() What port(s) you forward to your Ubuntu 18.04 server to access OpenVPN will depend on how you set up OpenVPN. To port forward, you need to log in to your router (most likely supplied to you by your ISP) and then Google "how to set up port forwarding on ". If you haven't set up port forwarding, no ports are going to be open on your IP address, which doesn't necessarily mean your ISP is doing anything. I don't trust the method you used to determine your ISP "filters all ports so you're unable to do port forwarding".
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