question: How to change DNS settings for Asus Routers
answer: 
  Need a VPN for your router?
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  Looking for a fast, secure VPN setup? If you have an Asus RT-AC68U (up to v3), RT-AC87U, RT-AC56R, RT-AC56S, or RT-AC56U, you can set up the ExpressVPN app for routers.
  
  This tutorial will show you how to configure your Asus router with MediaStreamer by changing your DNS settings.
  
  MediaStreamer is a DNS service designed to offer faster streaming speeds. To use MediaStreamer smoothly, you must register your IP address on the ExpressVPN website so ExpressVPN will recognize your IP address and grant MediaStreamer access to your device.
  
  Note: MediaStreamer is not a VPN and does not offer the privacy and security benefits of a VPN. You cannot change locations with MediaStreamer.
  
  The following steps were tested on an Asus RT-AC68U (up to v3).