Cisco ISE NAC Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The Cisco ISE must authenticate all endpoint devices before establishing a connection and proceeding with posture assessment. This is required for compliance with C2C Step 4.
Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. However, failure to authenticate an endpoint does not need to result in c...Rule Medium Severity -
SRG-NET-000343-NAC-001470
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The Cisco ISE must be configured to dynamically apply restricted access of endpoints that are granted access using MAC Authentication Bypass (MAB). This is required for compliance with C2C Step 4.
MAB can be defeated by spoofing the MAC address of a valid device. MAB enables port-based access control using the MAC address of the endpoint. A MAB-enabled port can be dynamically enabled or disa...Rule Medium Severity -
SRG-NET-000550-NAC-002470
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SRG-NET-000151-NAC-000630
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Before establishing a local, remote, and/or network connection with any endpoint device, the Cisco ISE must use a bidirectional authentication mechanism configured with a FIPS-validated Advanced Encryption Standard (AES) cipher block algorithm to authenticate with the endpoint device. This is required for compliance with C2C Step 1.
Bidirectional authentication provides stronger safeguards to validate the identity of other devices for connections that are of greater risk. Currently, DoD requires the use of AES for bidirectiona...Rule Medium Severity -
SRG-NET-000512-NAC-002310
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The Cisco ISE must enforce posture status assessment for posture required clients defined in the NAC System Security Plan (SSP). This is required for compliance with C2C Step 3.
Posture assessments can reduce the risk that clients impose on networks by restricting or preventing access of noncompliant clients. If the posture assessment is not enforced, then access of client...Rule High Severity -
SRG-NET-000512-NAC-002310
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The Cisco ISE must have a posture policy for posture required clients defined in the NAC System Security Plan (SSP). This is required for compliance with C2C Step 2.
Posture assessments can reduce the risk that clients impose on networks. The posture policy is the function that can link requirements to applicable clients. Multiple requirements can be associated...Rule High Severity
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