OpenWRT

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

Contents

• Block Google DNS on OpenWRT
• Power-cycle your devices
• Test your Google DNS block

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