The OpenVPN management interface
One of the most powerful but less well-known options of OpenVPN is the management interface. The management interface is available on both the server side and the client side. On the server side, it can be used to collect statistics, monitor and control the connected clients, and perform other management related tasks. On the client side, it can be used to query for passwords, enter proxy information for establishing a connection with the VPN server, interact with a PKCS #11 device, and collect client-side statistics.
The OpenVPN plugin for the Linux NetworkManager makes extensive use of the management interface to control the startup and shutdown of the VPN connection.
To use the management interface, add a line ...
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