The VPN Gateway must use an approved Commercial Solution for Classified (CSfC) when transporting classified traffic across an unclassified network.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-207242	SRG-NET-000352	SRG-NET-000352-VPN-001460	SV-207242r878132_rule	2024-12-19	3

Description
Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. The National Security Agency/Central Security Service's (NSA/CSS) CSfC Program enables commercial products to be used in layered solutions to protect classified National Security Systems (NSS) data. Currently, Suite B cryptographic algorithms are specified by NIST and are used by NSA's Information Assurance Directorate in solutions approved for protecting classified and unclassified NSS. However, quantum resistant algorithms will be required for future required Suite B implementations.

Description

Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. The National Security Agency/Central Security Service's (NSA/CSS) CSfC Program enables commercial products to be used in layered solutions to protect classified National Security Systems (NSS) data. Currently, Suite B cryptographic algorithms are specified by NIST and are used by NSA's Information Assurance Directorate in solutions approved for protecting classified and unclassified NSS. However, quantum resistant algorithms will be required for future required Suite B implementations.

ℹ️ Check
Verify the VPN Gateway uses an approved Commercial Solution for Classified (CSfC) when transporting classified traffic across an unclassified network. If the VPN Gateway does not use an approved Commercial Solution for Classified (CSfC) when transporting classified traffic across an unclassified network, this is a finding.

✔️ Fix
Configure the VPN Gateway to use an approved Commercial Solution for Classified (CSfC) when transporting classified traffic across an unclassified network.