Question 660
An IPS signature blocks a legitimate vendor protocol after a ruleset update and the team needs a scoped tuning decision. Which TWO complementary steps provide the most defensible remediation and its supporting assessment? Select TWO.
Explanation
Correct Answers
Associate an appropriate intrusion and file policy with the relevant FTD traffic rule, then tune detection against validated test cases. This control addresses the failure mechanism and narrows the enforcement boundary. A network allow decision alone does not guarantee intrusion inspection; relevant inline policy and traffic visibility must be enabled. Confirm pre-change conditions using: Inspect access-rule association, intrusion policy, detection events, file reputation, TLS visibility, and false-positive evidence. This is the implementation portion of the complementary pair. Situation: An IPS signature blocks a legitimate vendor protocol after a ruleset update and the team needs a scoped tuning decision.
Inspect access-rule association, intrusion policy, detection events, file reputation, TLS visibility, and false-positive evidence. This checks the relevant condition before an engineer modifies production access or detection behavior. A network allow decision alone does not guarantee intrusion inspection; relevant inline policy and traffic visibility must be enabled. The controlled response would be: Associate an appropriate intrusion and file policy with the relevant FTD traffic rule, then tune detection against validated test cases. This supplies the diagnostic evidence needed for the complementary action. Situation: An IPS signature blocks a legitimate vendor protocol after a ruleset update and the team needs a scoped tuning decision.
Incorrect Answers
Apply application-aware restrictions and appropriate URL categories to FTD policies while checking TLS and application identification limits. This step could matter for Application visibility control and URL filtering but is not part of the required complementary pair for this case. The paired steps are: Associate an appropriate intrusion and file policy with the relevant FTD traffic rule, then tune detection against validated test cases. and Inspect access-rule association, intrusion policy, detection events, file reputation, TLS visibility, and false-positive evidence. Situation: An IPS signature blocks a legitimate vendor protocol after a ruleset update and the team needs a scoped tuning decision.
An unauthorized small switch cannot flood excessive MAC identities or form an unintended Layer 2 loop without detection. This step could matter for Layer 2 port hardening and storm control but is not part of the required complementary pair for this case. The paired steps are: Associate an appropriate intrusion and file policy with the relevant FTD traffic rule, then tune detection against validated test cases. and Inspect access-rule association, intrusion policy, detection events, file reputation, TLS visibility, and false-positive evidence. Situation: An IPS signature blocks a legitimate vendor protocol after a ruleset update and the team needs a scoped tuning decision.
Inspect endpoint identity assignments, VLAN membership, SGT propagation, trustsec matrix rules, and routed reachability. This step could matter for VLAN segmentation and SGT policy but is not part of the required complementary pair for this case. The paired steps are: Associate an appropriate intrusion and file policy with the relevant FTD traffic rule, then tune detection against validated test cases. and Inspect access-rule association, intrusion policy, detection events, file reputation, TLS visibility, and false-positive evidence. Situation: An IPS signature blocks a legitimate vendor protocol after a ruleset update and the team needs a scoped tuning decision.


