question: How to set up Dynamic DNS (DDNS) on a router running ExpressVPN
answer: 
  This tutorial will show you how to set up Dynamic DNS (DDNS) on a router running ExpressVPN.
  
  If your network uses dynamic IP addresses, it means the IP addresses assigned to devices change over time. A DDNS provides a fixed point of reference, called a static hostname. It is useful for hosting a server or website from your home, even if your IP address is continually changed by your internet service provider.
  
  Jump to…
  
  1. Get your DDNS hostname
  2. Configure Dynamic DNS on the router
  Update your IP address manually
  
  1. Get your DDNS hostname