question: How to block specific IP addresses on D-Link routers
answer: 
  Certain streaming services will function more reliably if you block specific IP addresses on your router. This guide will show you how to block specific IP addresses on D-Link routers, using two Google DNS server addresses as an example (8.8.8.8 and 8.8.4.4).
  
  To block specific IP addresses on your D-Link router, you’ll need to set static route rules. These rules ensure your network traffic will not flow through the IPs you specified.
  
  With your router connected to the internet, go to http://dlinkrouter.local/ or enter your router’s gateway address (e.g., 192.168.2.1, 192.168.1.1, or 192.168.0.1). If you’re stuck, see instructions for finding your router gateway.
  Sign in with your router username and password.
  At the top of the page, go to Advanced > Static Route.
  Click on Add Route.
  Fill in the following information:
  Name: <name of route to be blocked> (e.g., Google)
  Destination Network: 8.8.8.8