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Palo Alto Networks NGFW-Engineer Exam - Topic 3 Question 23 Discussion

Posted by Xochitl on Jun 17, 2026 at 06:12 AM

A PA-Series firewall with all licensable features is being installed. The customer's Security policy requires that users do not directly access websites. Instead, a security device must create the connection, and there must be authentication back to the Active Directory servers for all sessions.

Which action meets the requirements in this scenario?

Suggested Answer: D

In this scenario, the customer requires that users do not directly access websites and that a security device (the firewall) manages the connection, while also ensuring that there is authentication back to the Active Directory (AD) servers for all sessions. The explicit proxy with Kerberos authentication is the best solution because:

The explicit proxy allows the firewall to intercept user web traffic and manage the connections on behalf of users.

Kerberos authentication ensures that the user's identity is validated against the Active Directory servers before the session is allowed, fulfilling the authentication requirement.


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19 comments · newest first
CH
Cherrie 15 days ago
Agreed, D ensures users can't bypass the proxy.
DE
Derrick 20 days ago
D seems most aligned with the security policy.
LU
Luann 25 days ago
Right, C doesn't fully meet the access requirement.
CH
Cherrie 1 month ago
C could work too, but it’s more about filtering than access control.
JU
Juan 1 month ago
Good point, but B still manages user identities well.
DE
Derrick 1 month ago
True, but it doesn't enforce the proxy requirement.
LU
Luann 2 months ago
I prefer B. User-ID agent is solid for tracking users.
JU
Juan 2 months ago
It uses Kerberos for authentication, fits the policy.
DE
Derrick 2 months ago
Why D?
JU
Juan 2 months ago
I think D is the best choice.
ED
Edna 2 months ago
Not sure if D is the right move; explicit proxies can be tricky.
DE
Denny 2 months ago
Wait, I didn't know Kerberos could be used like that!
TY
Ty 3 months ago
I disagree, B could work too with User-ID for AD integration.
BU
Buddy 3 months ago
A transparent proxy won't enforce the security policy properly.
KI
King 3 months ago
I think D is the best choice here. Kerberos is solid for authentication.
CA
Carin 3 months ago
Captive portal sounds familiar, but I’m not clear if it would handle the authentication back to Active Directory as needed.
TU
Tuyet 3 months ago
I practiced a similar question where we had to consider user identification methods. The User-ID agent could be relevant here, but I’m not convinced it fully meets the requirement.
LY
Lyndia 3 months ago
I'm not entirely sure, but I remember something about WCCP being used for transparent proxies. Does that fit the need for user authentication?
AR
Arleen 4 months ago
I think the explicit proxy option might be the right choice since it mentions Kerberos authentication, which aligns with the AD requirement.
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