Attention! Factory firmware AsusWRT does not always have OpenVPN support. Connection via OpenVPN is available in alternative AsusWRT based firmware (Merlin, Padavan, XWRT).
Download OpenVPN configuration files for Linux, unzip the archive to Desktop.
Open the admin panel of the router, go to the VPN section.
Go to the VPN Client tab, switch to OpenVPN.
Import OpenVPN configuration from the unpacked archive. Select a file and click Upload.
In the Basic Settings section:
In the Advanced Settings section:
In the Client Control section switch on Service State.
Connection to the OpenVPN server established successfully!