@chenhui Thanks for your tip, I've just enabled dns proxy on the router and did some tests,
server 10.0.30.1
Default Server: [10.0.30.1]
Address: 10.0.30.1
test.com
Server: [10.0.30.1]
Address: 10.0.30.1
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
DNS request timed out.
timeout was 2 seconds.
Name: test.com
Address: 10.0.30.17
exit
C:\Users\user1>ping test.com
Pinging test.com [69.172.200.235] with 32 bytes of data:
Has you can see when I do nslookup and set the server to 10.0.30.1 it can resolve the internal IP, but ping still goes outside, I did a DNS flush and reboot the PC, and still the same behaviour.
Is it normal? should I reboot the router?