Question 520
A newly deployed SNMPv3 user can authenticate but privacy negotiation fails after the device cipher settings change. Which TWO complementary steps provide the most defensible remediation and its supporting assessment? Select TWO.
Explanation
Correct Answers
Inspect SNMP user groups, auth/priv settings, engine IDs, management ACLs, and failed polling logs. This checks the relevant condition before an engineer modifies production access or detection behavior. SNMPv3 supports integrity and encryption for management queries when authPriv is configured; SNMPv1 community strings do not provide equivalent protection. The controlled response would be: Use SNMPv3 with authentication and privacy where appropriate and restrict agents to approved management sources and read views. This supplies the diagnostic evidence needed for the complementary action. Situation: A newly deployed SNMPv3 user can authenticate but privacy negotiation fails after the device cipher settings change.
Use SNMPv3 with authentication and privacy where appropriate and restrict agents to approved management sources and read views. This control addresses the failure mechanism and narrows the enforcement boundary. SNMPv3 supports integrity and encryption for management queries when authPriv is configured; SNMPv1 community strings do not provide equivalent protection. Confirm pre-change conditions using: Inspect SNMP user groups, auth/priv settings, engine IDs, management ACLs, and failed polling logs. This is the implementation portion of the complementary pair. Situation: A newly deployed SNMPv3 user can authenticate but privacy negotiation fails after the device cipher settings change.
Incorrect Answers
A simulated sensor failure follows the approved availability policy and exploit test traffic is blocked only when inspection is actually inline. This step could matter for Inline IPS availability and bypass behavior but is not part of the required complementary pair for this case. The paired steps are: Use SNMPv3 with authentication and privacy where appropriate and restrict agents to approved management sources and read views. and Inspect SNMP user groups, auth/priv settings, engine IDs, management ACLs, and failed polling logs. Situation: A newly deployed SNMPv3 user can authenticate but privacy negotiation fails after the device cipher settings change.
Protect programmable device management with authenticated endpoints, transport encryption, role authorization, and change transaction logging. This step could matter for NETCONF RESTCONF and API management security but is not part of the required complementary pair for this case. The paired steps are: Use SNMPv3 with authentication and privacy where appropriate and restrict agents to approved management sources and read views. and Inspect SNMP user groups, auth/priv settings, engine IDs, management ACLs, and failed polling logs. Situation: A newly deployed SNMPv3 user can authenticate but privacy negotiation fails after the device cipher settings change.
Inspect bidirectional security association counters, packet traces, NAT policy, route selection, and remote selectors. This step could matter for FTD VPN up but no protected data but is not part of the required complementary pair for this case. The paired steps are: Use SNMPv3 with authentication and privacy where appropriate and restrict agents to approved management sources and read views. and Inspect SNMP user groups, auth/priv settings, engine IDs, management ACLs, and failed polling logs. Situation: A newly deployed SNMPv3 user can authenticate but privacy negotiation fails after the device cipher settings change.


