Palo Alto Networks maintains a Content Delivery Network
(CDN) infrastructure for delivering content updates to the Palo
Alto Networks firewalls. The firewalls access the web resources
in the CDN to perform various content and application identification
The following table lists the web resources that the firewall
accesses for a feature or application:
the following URLs to your firewall allow list if your firewall
has limited access to the Internet:
a best practice, set the update server to updates.paloaltonetworks.com.
This allows the Palo Alto Networks firewall to receive content updates
from the server closest to it in the CDN infrastructure.