Forescout appliance must not be configured to implement a DHCP layer 3 method for separation or device authorization. (Cat I impact)
An internal rogue device can still bypass the authentication process, regardless of the policy flow. Configuring the NAC to process all device authentication will ensure that any rogue device, internal or external, will be authenticated prior to network access.
Check Forescout policy and ensure it is configured to prohibit the use of DHCP to separate authenticated and non-authenticated network access requests. If the NAC does not prohibit the use of DHCP to separate authenticated and non-authenticated network access requests, this is a finding.
Log on to the Forescout UI. 1. Locate the Authentication & Authorization policy. 2. Ensure all traffic passing through the NAC is properly labeled and that all authenticated and non-authenticated traffic goes through the NAC.
The information system enforces approved authorizations for logical access to information and system resources in accordance with applicable access control policies.