Question 380
Before accepting a secure access rollout, the team finds: An administrator tries to block a high-risk erase command while using a permissive default command set, but the dangerous command still succeeds. What should the engineer implement to restore the intended access flow?
Explanation
Correct Answer
The underlying cause is: Command authorization must have an effective explicit deny or allowlist design that is evaluated as configured; a broad permit can undermine restrictions. The correct response is: Refine the applicable TACACS command set to deny the unwanted command and test the matched arguments without granting broad bypass. Confirm by checking: A test administrator can perform approved maintenance commands but the restricted destructive command is rejected by the device.
Incorrect Answers
That intervention addresses tacacs plus aaa for network device administrators, where RADIUS network access authorization and TACACS+ device administration offer different policy and command-control capabilities in ISE. Here, the relevant failure is instead: Command authorization must have an effective explicit deny or allowlist design that is evaluated as configured; a broad permit can undermine restrictions.
That intervention addresses tacacs command accounting audit trail, where Authentication records identify login attempts, whereas TACACS+ command accounting needs separate device configuration to report executed administrative actions. In this question the necessary remedy is “Refine the applicable TACACS command set to deny the unwanted command and test the matched arguments without granting broad bypass”, which this alternative does not provide.
That intervention addresses tacacs shell profile privilege level, where An ISE TACACS shell profile can return session privilege attributes, which must match the operator's role and device requirements. The observed condition is an administrator tries to block a high-risk erase command while using a permissive default command set, but the dangerous command still succeeds; this mechanism addresses another problem.