Cisco ISE NAC Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The Cisco ISE must verify host-based IDS/IPS software is authorized and running on posture required clients defined in the NAC System Security Plan (SSP) prior to granting trusted network access. This is required for compliance with C2C Step 4.
Automated policy assessments must reflect the organization's current security policy so entry control decisions will happen only where remote endpoints meet the organization's security requirements...Rule High Severity -
For endpoints that require automated remediation, the Cisco ISE must be configured to redirect endpoints to a logically separate VLAN for remediation services. This is required for compliance with C2C Step 4.
Automated and manual procedures for remediation for critical security updates will be managed differently. Continuing to assess and remediate endpoints with risks that could endanger the network co...Rule Medium Severity -
The Cisco ISE must be configured to notify the user before proceeding with remediation of the user's endpoint device when automated remediation is used. This is required for compliance with C2C Step 3.
Notification will let the user know that installation is in progress and may take a while. This notice may deter the user from disconnecting and retrying the connection before the remediation is co...Rule Low Severity -
The Cisco ISE must be configured so that all endpoints that are allowed to bypass policy assessment are approved by the Information System Security Manager (ISSM) and documented in the System Security Plan (SSP). This is This is required for compliance with C2C Step 1.
Connections that bypass established security controls should be only in cases of administrative need. These procedures and use cases must be approved by the Information System Security Manager (ISSM).Rule Medium Severity -
The Cisco ISE must send an alert to the Information System Security Manager (ISSM) and System Administrator (SA), at a minimum, when security issues are found that put the network at risk. This is required for compliance with C2C Step 2.
Trusted computing should require authentication and authorization of both the user's identity and the identity of the computing device. An authorized user may be accessing the network remotely from...Rule Medium Severity -
When endpoints fail the policy assessment, the Cisco ISE must create a record with sufficient detail suitable for forwarding to a remediation server for automated remediation or sending to the user for manual remediation. This is required for compliance with C2C Step 3.
Failing the NAC assessment means that an unauthorized machine has attempted to access the secure network. Without generating log records that are specific to the security and mission needs of the o...Rule Medium Severity -
The Cisco ISE must place client machines on the blacklist and terminate the agent connection when critical security issues are found that put the network at risk. This is required for compliance with C2C Step 4.
Since the Cisco ISE devices and servers should have no legitimate reason for communicating with other devices outside of the assessment solution, any direct communication with unrelated hosts would...Rule Medium Severity -
The Cisco ISE must be configured with a secondary log server in case the primary log is unreachable. This is required for compliance with C2C Step 1.
It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without this notification, the security personnel may be unaware of an ...Rule Medium Severity -
The Cisco ISE must generate a critical alert to be sent to the ISSO and SA (at a minimum) if it is unable to communicate with the central event log. This is required for compliance with C2C Step 1.
It is critical for the appropriate personnel to be aware if a system is at risk of failing to process audit logs as required. Without this notification, the security personnel may be unaware of an ...Rule Medium Severity -
The Cisco ISE must continue to queue traffic log records locally when communication with the central log server is lost and there is an audit archival failure. This is required for compliance with C2C Step 1.
It is critical that when the network element is at risk of failing to process traffic logs as required, it takes action to mitigate the failure. Audit processing failures include software/hardware ...Rule Medium Severity
Node 2
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