Forescout appliance must not be configured to implement a DHCP layer 3 method for separation or device authorization.

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Forescout appliance must not be configured to implement a DHCP layer 3 method for separation or device authorization.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-233315	FORE-NC-000070	SV-233315r611394_rule		High

Description
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.

STIG	Date
Forescout Network Access Control Security Technical Implementation Guide	2020-12-11

Details

Check Text ( C-36510r605648_chk )
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.

Fix Text (F-36475r605649_fix)
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.