How to configure Bro to detect UDP port 53

Hi all,

I am a new Bro user, I did few experiments to read the same DNS trace file
via Bro online version and Bro from my personal PC. The version number is

I got some interesting results. the online version checks UDP port 53 5353
and 5355 (port 53 has record). But, the one on my PC only checks port 5353
and 5355(No DNS query print out).

Is this a configuration issue? And is there a way that I can configure my
Bro to check port 53?