Forescout must use TLS 1.2, at a minimum, to protect the confidentiality of information passed between the endpoint agent and Forescout for the purposes of client posture assessment. This is required for compliance with C2C Step 1.

Severity
Group ID
Group Title
Version
Rule ID
Date
STIG Version
mediumV-233332SRG-NET-000062-NAC-000340FORE-NC-000270SV-233332r811414_rule2024-12-192
Description
Using older unauthorized versions or incorrectly configuring protocol negotiation makes the gateway vulnerable to known and unknown attacks that exploit vulnerabilities in this protocol.
ℹ️ Check
If DoD is not at C2C Step 1 or higher, this is not a finding. Verify Forescout is configured to a list of DoD-approved certificate types and CAs. Verify the TLS session is configured to automatically terminate any session if the client does not have a suitable certificate. For TLS connections, if Forescout is not configured to use TLS 1.2 at a minimum, this is a finding.
✔️ Fix
Configure the SecureConnector to ensure the minimum supported TLS version is set to TLS 1.2. Log on to the Forescout UI. 1. Select Tools >> Options >> Certificates. 2. Check the Ongoing TLS Sessions section, view the Re-verify TLS Sessions. 3. Change the Re-verify TLS Sessions to Every 1 Day or in accordance with the site's SSP, then click "Apply". 4. Next, select the HPS Inspection Engine >> SecureConnector. 5. In the Client-Server Connection, ensure the Minimum Supported TLS Version is set to TLS version 1.2.