Palo Alto Networks DNS Security

DISA STIG audit rule: The Palo Alto Networks security platform must not enable the DNS proxy.

Basically, DISA is staying “Don't put all your eggs in one basket”.

The Palo Alto Networks security platform can act as a DNS proxy and send the DNS queries on behalf of the clients. DNS queries that arrive on an interface IP address can be directed to different DNS servers based on full or partial domain names.

However, unrelated or unneeded proxy services increase the attack vector surface and add excessive complexity to securing the device.