Forum Discussion
JRahm
Aug 06, 2015Admin
The self-IP usually shares the same IP address with a GTM listener, so if you do not have UDP/TCP port 53 open, no resolutions will occur to your GTM listener as the self-IP restrictions are processed first. If you use a different IP than the self for the GTM listener, it should not be a problem to disable port 53 on the self.