OpenWRT

These instructions may vary based on the OpenWRT version you use.

Contents

Block Google DNS on OpenWRT

  • Open the OpenWRT settings page and navigate to: Network > Firewall > Traffic Rules.
  • Under New forward rule enter DNS as the name, choose source zone lan, destination zone wan and click Add and edit..
  • Enter the following information:
  • Name: DNS
  • Restrict to address family: IPv4
  • Protocol: TCP+UDP
  • Match ICMP type: any
  • Source zone: lan
  • Source MAC address: any
  • Source address: any
  • Source port:
  • Destination zone: wan
  • Destination address: choose Custom and enter 8.8.8.8
  • Action: Reject
  • Extra arguments:
  • You'll end up with something like this:
  • Click Save & Apply.
  • Repeat the same steps for Destination address: 8.8.4.4.
  • Click Save & Apply once more on the Firewall - Traffic Rules page.

Power-cycle your devices

To make sure all your devices use the new DNS settings, please follow these steps:

  • Turn off the device.
  • Unplug the power cable from the router.
  • Wait 30 seconds.
  • Plug the power cable back in.
  • Turn the device back on.

Test your Google DNS block

We recommend that you verify the block by trying to ping Google's DNS servers.

  • On Windows, please open a Command Prompt. On OS/X, open a Terminal instead.
  • Enter the following command in the Command Prompt or Terminal: ping 8.8.8.8 This will send a series of pings to the Google DNS server. If they all fail, your block is working properly.
  • Repeat the test for 8.8.4.4: ping 8.8.4.4