How to Block Google DNS on DD-WRT routers

Please be aware that DD-WRT by nature is an advanced topic. We don't provide support for DD-WRT configuration and you are expected to have an intermediate understanding of networking.

  1. Find your router's IP. Follow this guide for more information on how to get it.
  2. Open your web browser and enter your router's IP in the address bar.
  3. Log in to your router. Default user info for DD-WRT is root/admin
  4. Go to Setup > Basic Setup > Network Setup > Network Address Server Settings (DHCP)
  5. Set DNS to and
  6. Click Apply Settings
  7. Go to Services > Services > Services Management > DNSMasq > Additional DNSMasq Optionsand enter the following in the text box: strict-order
  8. Click Apply Settings
  9. Go to Administration > Commands
  10. input:
    iptables -I FORWARD --destination -j REJECT
    iptables -I FORWARD --destination -j REJECT
  11. Click save firewall
  12. ​Click save startup



First step of troubleshooting should always be to restart device(s) and router. Then check your setup status in your SmartDNS dashboard

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