How to block public DNS on DD-WRT Routers

HOW TO SETUP THE BLOCKS

Login to the Router

  1. Login to your DD-WRT Router
  2. The default address is either http://192.168.1.1 or http://192.168.0.1 and the default username and password is usually ‘admin’for both.

Add the Firewall Rules

  1. Navigate ‘Administration’ and go to ‘Commands’
  2. Type in the following rules in the Commands field.

    iptables -I PREROUTING -t nat -p udp -d 8.8.4.4 –dport 53 -j DNAT –to-destination 128.199.248.157
    iptables -I PREROUTING -t nat -p udp -d 8.8.8.8 –dport 53 -j DNAT –to-destination 128.199.248.157

  3. Save Firewall by clicking on ‘Save to StartUp’
  4. Click here to see latest Trickbyte dns list ->http://www.trickbyte.com/trickbyte-dns-list/

Restart Router         

  1. Navigate to Administration -> Management and click ‘Reboot Router’ in the bottom right of your display screen.

HOW TO REMOVE THE BLOCKS

First Log in to your Router

  1. Login to your DD-WRT Router

Remove Firewall Rules

  1. Navigate to Administration -> Commands
  2. Leave the Commands field empty.
  3. Click on ‘Save Firewall’

Restart Router

  • Navigate to Administration -> Management and click ‘Reboot Router’