I had https://pivpn.dev/ successfully running for a while withuot any issues. Then suddenly it stopped working. The configuration was never received on various devices. Unfortunately there was absolutely no information anywhere – no logs, search results returned big essays on OpenVPN.

There is a little handy command which can actually fix the issues in a moment.

Go to the VPN server and just run pivpn -d

Running the pivpn command with -d option fixes most of the issues.

Its diagnosis will be printed to the screen.

=============================================
::::        Self check       ::::
:: [OK] IP forwarding is enabled
:: [OK] Ufw is enabled
:: [OK] Iptables MASQUERADE rule set
:: [OK] Ufw input rule set
:: [OK] Ufw forwarding rule set
:: [OK] OpenVPN is running
:: [OK] OpenVPN is enabled (it will automatically start on reboot)
:: [OK] OpenVPN is listening on port 1194/udp
=============================================
::::      Snippet of the server log      ::::
=============================================
::::        Debug complete       ::::
:::
::: Debug output completed above.
::: Copy saved to /tmp/debug.txt