If the device is unable to resolve any of the listed domains within the logs, one would expect these logs to be generated within the System logs.
So diving a bit deeper:
This is slightly confusing as the 'type' of dnsproxy would indicate to many that you are using the actual dnsproxy feature on the firewall, but this isn't the case. There is a object by default called mgmt-obj that works to resolve hostnames when you check on the "resolve hostname" checkbox in the various logs, or if you utilize that feature during a scheduled job. This trigers a reverse dns lookup using the arpa database, and sends a dns query for a pointer record of the domain name.
If this process fails for any reason you would see the indicated logs; many people have noticied it with 8.1 in particular.
Click Accept as Solution to acknowledge that the answer to your question has been provided.
The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!
These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the Live Community as a whole!
The Live Community thanks you for your participation!