The phone cannot connect to the VPN server

The phone cannot connect to the VPN server.

1. Check that the VPN server is up and running.
   After the VPN server is running, the VPN icon in the taskbar will appear green, and the virtual IP of the VPN server can be seen by moving the mouse over the VPN icon, as shown in the figure below:
   

2. Check the VPN configuration file for the phone.

1. Extract the tar file from the phone. The directory name must be keys, and the configuration file name must be vpn.cnf. as shown in the figure below:
   

2. Check whether the VPN certificate file and configuration file of the phone are correct. Enter the Keys directory, as shown in the figure below:
   The file name corresponding to ca, cert, and key should be the same as the names of the three files in the keys directory.
   The certificate path should be: /config/openvpn/keys/
   

3. Check whether the VPN configuration file of the phone and the configuration file of the server match. As shown in the figure below:
   Several configurations marked with red arrows should be consistent with the server.
   

4. If it still cannot be connected, please check whether the phone time is within the valid period of the certificate. Double-click the client certificate file to check the valid period of the certificate.

5. Please double-check if all tar files are packaged correctly. Please package with the 7-zip tool.