Listed below are important links to setup instructions for connecting an Asus Merlin firmware router to the internet and WiFi.
Internet Setup for AsusWRT-Merlin Routers
DNS Setup for Asus Merlin
Enter custom DNS servers in your Asus Merlin firmware to avoid using your ISP DNS, which will steal and collect your browsing data.
Login to Asus Merlin firmware settings in a browser on any computer or smart device.
1. Under Advanced Settings select LAN.
2. Click the DHCP Server tab.
3. In the DNS Server 1 and DNS Server 2 fields enter the DNS server that you wish to use.

4. Click Apply and then reboot the router and reconnect to the network.