DNS converts domain names into IP addresses. Router-level DNS settings can apply to many devices at once.
- Open Internet, WAN, or DHCP settings.
- Disable automatic DNS only if you understand the change.
- Enter the primary and secondary resolver addresses.
- Save, restart if requested, and test browsing.
Encrypted DNS configured on an individual browser or device may override the router setting.
Place the concept in the packet path
How to Change Router DNS Settings is easier to understand by following one connection. A client receives local addressing, decides whether a destination is local, sends off-subnet traffic to the gateway and may rely on DNS to translate a name. NAT or IPv6 routing then carries the traffic beyond the LAN.
How to test the right component
Record the client's IP address, prefix or mask, gateway and DNS servers. Test the gateway first, then an Internet IP address, then a domain name. This sequence separates local addressing, upstream reachability and name resolution instead of treating every failure as “the Wi‑Fi.”
Final verification step
After changing DNS, clear or renew cached settings on a test client and verify which resolver it actually received. Browser secure-DNS features can override router-provided DNS, so compare operating-system and browser behaviour when results differ.