Have you defined your Gateway correctly?
Most routers resolve the DNS automatically, so it's important that you define your gateway.
But for best performance you could define the primary and secondary DNS pointing to your router, and/or modem attached to router.
Example:
Gateway: 192.168.2.1 (router)
Primary DNS: 192.168.2.1 (router)
Secondary DNS: 192.168.1.254 (modem)
|