Question 120
During a post-incident review at a logistics office, the original problem was: A Security rule permits domain administrators from a named address range, but the address range also covers contractor kiosks. Which preventive practice most directly addresses its cause?
Explanation
Correct Answer
Revalidate source address groups after subnet or identity boundary changes. This control reduces recurrence of the documented mechanism: IP range membership alone may not represent the privileged population intended by policy. It creates a repeatable check around the needed response: Replace the broad source object with accurate privileged endpoint and identity matching as appropriate.
Incorrect Answers
Analyze rule hit counts and precedence for identity policy changes. That safeguard addresses another potential failure: A user identification policy rule looks correct, but traffic logs show the session matching an earlier any-user permit rule. It is not the most targeted recurring control for the described cause: IP range membership alone may not represent the privileged population intended by policy.
Test vendor updates with both App-ID and port conditions during maintenance acceptance. That safeguard addresses another potential failure: A firewall's allow rule for a software update service specifies application-default but the updater uses a vendor-defined nonstandard port that is not supported under the current application definition. It is not the most targeted recurring control for the described cause: IP range membership alone may not represent the privileged population intended by policy.
Route centrally managed rule changes through their authoritative configuration scope. That safeguard addresses another potential failure: An analyst edits a local firewall Security policy while the same rule is centrally managed and overwritten by the next cloud push. It is not the most targeted recurring control for the described cause: IP range membership alone may not represent the privileged population intended by policy.