Different Interview question for the PaloAlto Firewall

What is the difference between Layer 3, Layer 2, and Virtual Wire (V-Wire) modes?

What are the main deployment modes available in Palo Alto firewalls?

What is an App-ID, and why is it important?

What are Content-ID and User-ID in Palo Alto?

What is a Security Policy rule?

Explain the difference between Security Policy, NAT Policy, and QoS Policy.

What are Zones in Palo Alto, and how do they work?

What is the purpose of Virtual Routers in Palo Alto?

What are the default security rule actions (intra-zone, inter-zone, etc.)?

What is a Panorama in Palo Alto Networks?

What is a Security Profile? Give examples.

What are the management ports in a Palo Alto firewall?

What is the function of the management interface?

What is the difference between the management plane and data plane?

How does Palo Alto identify applications that use non-standard ports?

Explain the difference between Source NAT and Destination NAT.

What is the purpose of the NAT rule’s untrust-to-untrust configuration?

What is the order of policy evaluation in Palo Alto (NAT vs. Security)?

What are the steps to troubleshoot traffic not passing through the firewall?

How can you check session information for a specific traffic flow?

Explain the difference between session start logs and session end logs.

How does Palo Alto perform SSL Decryption?

What is the role of the Management Plane and Control Plane?

How do you perform packet captures on a Palo Alto Firewall?

What is a “commit” operation, and what happens during it?

How do you roll back a configuration in Palo Alto?

Explain the function of the GlobalProtect VPN.

What is a Zone Protection Profile, and how is it used?

What is the difference between DoS protection and Zone Protection?

How does Palo Alto detect and prevent threats (AV, Spyware, URL, WildFire)?

What is WildFire? How does it differ from Antivirus?

How does Palo Alto identify users without installing an agent?

What is the difference between a dynamic update and a content update?

How do you check logs for dropped packets or denied traffic?

Describe the packet flow in a Palo Alto Firewall.

How would you analyze a slow application issue behind a Palo Alto firewall?

What happens when a packet enters the firewall (from ingress to egress)?

How would you troubleshoot asymmetric routing issues?

How does Palo Alto handle HA (High Availability)?

What are the HA modes available (Active/Passive, Active/Active)?

How do you synchronize configurations between HA peers?

What are the common HA failover triggers?

Explain the process of SSL decryption — inbound vs. outbound.

How do you secure GlobalProtect using certificates?

What are the benefits of using Panorama for centralized management?

How can you use API calls to configure or monitor the Palo Alto firewall?

What is a "Dynamic Address Group," and when would you use it?

How do you integrate Palo Alto with LDAP/Active Directory for User-ID?

What are “Application Override” rules, and why would you need one?

What is session offloading, and when does it occur?

How does Palo Alto handle fragmented packets?

How do you identify and mitigate a DDoS attack in Palo Alto?

How can you check resource utilization (CPU, memory) on a firewall?

How do you debug policy match issues using the CLI?