A security team is deploying Cloud Native Application Firewall (CNAF) on a containerized web application.

https://docs.paloaltonetworks.com/prisma/prisma-cloud/19-11/prisma-cloud-compute-edition-admin/firewalls/deploy_cnaf

When configuring Cloud Native Application Firewall (CNAF) rules, the specified port should be the one where the container itself listens for web traffic. In this scenario, since the NGINX container is listening on port 8080, the CNAF rule should be configured to protect traffic on port 8080. This ensures that the firewall rule is applied to the traffic intended for the container, regardless of the port mapping on the host.

The documentation from Palo Alto Networks provides guidance on deploying CNAF and specifies that the port in the firewall rule should match the container’s listening port, not the host’s mapped port. This is an important distinction for properly securing containerized applications with CNAF.