The
DNS Security service collects
server response and request information based on your firewall security
policy rules, associated action, and the DNS query details when
performing domain lookups. The firewall forwards supplemental DNS
data to the DNS Security cloud servers and is used by Palo Alto
Networks services to provide more accurate domain information (such
as provider ASN, hosting information, and geolocation identification).
While this supplemental data is not necessary to operate the DNS
Security service, it provides the resources to generate improved
analytics, DNS detection, and prevention capabilities. This action
occurs in less than 30 seconds after collection and batching does
not impact firewall performance. In cases where the firewall is
experiencing a high load, DNS data collection scales down as needed
to maintain expected performance levels.