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Cisco ISE NAC Security Technical Implementation Guide

Version

V2R3

Release Date

Dec 10, 2025

SCAP Benchmark ID

Cisco_ISE_NAC_STIG

Total Checks

30

Tags

network

CAT I: 8CAT II: 21CAT III: 1

This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DOD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.

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Checks (30)

V-242575HIGHThe Cisco ISE must use TLS 1.2, at a minimum, to protect the confidentiality of information passed between the endpoint agent and the Cisco ISE. This is This is required for compliance with C2C Step 1.V-242576HIGHThe Cisco ISE must enforce approved access by employing authorization policies with specific attributes; such as resource groups, device type, certificate attributes, or any other attributes that are specific to a group of endpoints, and/or mission conditions as defined in the site's Cisco ISE System Security Plan (SSP). This is required for compliance with C2C Step 4.V-242577HIGHThe Cisco ISE must be configured to profile endpoints connecting to the network. This is required for compliance with C2C Step 4.V-242578HIGHThe Cisco ISE must verify host-based firewall software is 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.V-242579HIGHThe Cisco ISE must verify anti-malware software is installed and up to date 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.V-242580HIGHThe 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.V-242581MEDIUMFor 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.V-242582LOWThe 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.V-242583MEDIUMThe 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.V-242584MEDIUMThe 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.V-242585MEDIUMWhen 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.V-242586MEDIUMThe 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.V-242587MEDIUMThe Cisco ISE must be configured so client machines do not communicate with other network devices in the DMZ or subnet except as needed to perform an access client assessment or to identify themselves. This is required for compliance with C2C Step 2.V-242588MEDIUMThe Cisco ISE must deny or restrict access for endpoints that fail required posture checks. This is required for compliance with C2C Step 4.V-242589MEDIUMThe Cisco ISE must generate a log record when an endpoint fails authentication. This is This is required for compliance with C2C Step 1.V-242590MEDIUMThe Cisco ISE must generate a log record when the client machine fails posture assessment because required security software is missing or has been deleted. This is This is required for compliance with C2C Step 1.V-242591MEDIUMThe Cisco ISE must send an alert to the system administrator, at a minimum, when endpoints fail the policy assessment checks for organization-defined infractions. This is required for compliance with C2C Step 3.V-242594MEDIUMThe Cisco ISE must generate a critical alert to be sent to the ISSO and SA (at a minimum) in the event of an audit processing failure. This is required for compliance with C2C Step 1.V-242595MEDIUMThe Cisco ISE must provide an alert to, at a minimum, the SA and ISSO of all audit failure events where the detection and/or prevention function is unable to write events to either local storage or the centralized server. This is required for compliance with C2C Step 1.V-242596MEDIUMThe 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.V-242597MEDIUMThe 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.V-242598MEDIUMThe 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.V-242599MEDIUMThe Cisco ISE must perform continuous detection and tracking of endpoint devices attached to the network. This is required for compliance with C2C Step 1.V-242600MEDIUMThe Cisco ISE must deny network connection for endpoints that cannot be authenticated using an approved method. This is required for compliance with C2C Step 4.V-242601MEDIUMThe 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.V-242602MEDIUMThe 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.V-242603MEDIUMBefore establishing a connection with a Network Time Protocol (NTP) server, the Cisco ISE must authenticate using a bidirectional, cryptographically based authentication method that uses a FIPS-validated Advanced Encryption Standard (AES) cipher block algorithm to authenticate with the NTP server. This is required for compliance with C2C Step 1.V-242604MEDIUMBefore 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.V-242605HIGHThe 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.V-242606HIGHThe 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.