PCNSE Practice Question: Securing Users and Applications with Authentication
When configuring an authentication policy, which match criteria is required to trigger authentication?
⚠ Common exam trap
Many candidates assume the source user must be 'any' to match all users, but the correct required match is the source zone, as authentication policies are zone-based and the source user field is typically left as 'unknown' to trigger authentication for unauthenticated traffic.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Source zone must be specified.
In a PAN-OS authentication policy, the source zone is a required match criterion because the firewall must know which ingress zone the traffic is coming from to apply the correct authentication profile and enforce the policy. Without a specified source zone, the policy cannot be evaluated, as zone-based forwarding is fundamental to how the firewall processes traffic. This ensures that authentication is triggered only for traffic entering through a designated zone, such as an untrust or internal zone.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Application must be 'web-browsing'.
Why it's wrong here
Any application can be used; 'web-browsing' is just one example.
- ✗
Destination address must be the server IP.
Why it's wrong here
Destination address is optional; matching can be based on destination zone and application.
- ✗
Source user must be set to 'any'.
Why it's wrong here
Source user can be set to any specific user or 'any'; it is not a required field.
- ✓
Source zone must be specified.
Why this is correct
Source zone is a required parameter in authentication policy to define the inbound traffic zone.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNSE practice question is part of Courseiva's free Palo Alto Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCNSE exam.