AsusWRT Merlin is an alternative open source firmware for Asus routers. You will have to install this firmware manually on your router, and your warranty may be voided.
Follow this link if you want to set up VPN access on the default AsusWRT firmware instead.
Log in to your router and under Advanced Settings → WAN → WAN DNS Settings set Connect to DNS Server automatically to No and enter at least two public DNS servers. You can either use Google’s DNS servers (18.104.22.168, 22.214.171.124) or any from the OpenNIC project.
Then click on Apply.
Note: If you want, you can also use Perfect Privacy DNS servers (you can find the IPs on the DNS server page in the customer area). Note that these DNS servers will only resolve *.perfect-privacy.com domains when VPN is not connected which means that Internet access will not work without the VPN being connected.
However, there will be no DNS leak when using public name servers instead, since all DNS requests will be sent anonymized through the VPN tunnel while a VPN connection is established.
Navigate to Advanced Settings → VPN and click on the VPN Client tab. Next to Import .ovpn file click on Choose file and select one of the .ovpn files from the previously downloaded archive with configurations (see top of this guide). In this documentation we use Zurich.ovpn
Under Client control set Automatic start at boot time to Yes. (This will ensure that the OpenVPN connection will be established after restarting the router). Configure the rest of the settings as follows:
Under Rules for routing client traffic through the tunnel enter the following:
Then click on the + icon below Add/Delete.
Remove the line
in the Custom Configuration field.
Click on Apply and at the top switch the Service State to ON.
OpenVPN should now be connected. But you should restart your router to make sure OpenVPN will work correctly after a reboot.
You can check that the VPN connection is working correctly by visiting our Check IP website from any device connected to the router.