Question 280
An identity and device-administration engineer evaluates: A visitor authenticates on the portal yet gains employee network access because a broad post-auth rule matches the same network device group. What should be added to the maintenance or security review?
Explanation
Correct Answer
Test negative guest-to-internal access paths after any policy reordering. This control addresses recurrence of the observed failure. The governing behavior is: Web authentication verifies a guest principal; a separately evaluated authorization rule determines the access scope returned to the NAD. The ongoing acceptance check remains: The guest reaches only the isolated internet service while an employee still matches the employee authorization policy.
Incorrect Answers
The offered option specifies “Test portal reachability from the guest's restricted preauthentication network”. The question requires “Test negative guest-to-internal access paths after any policy reordering”: Web authentication verifies a guest principal; a separately evaluated authorization rule determines the access scope returned to the NAD. These are not equivalent responses to the stated requirement.
Allow only the portal's approved HTTPS destination and essential DNS or DHCP bootstrap traffic in the limited-access redirect ACL. The repeat risk here is different: Web authentication verifies a guest principal; a separately evaluated authorization rule determines the access scope returned to the NAD. A directly relevant preventive control is: Test negative guest-to-internal access paths after any policy reordering.
Include both denied and approved sponsor paths in portal acceptance tests. The repeat risk here is different: Web authentication verifies a guest principal; a separately evaluated authorization rule determines the access scope returned to the NAD. A directly relevant preventive control is: Test negative guest-to-internal access paths after any policy reordering.