II - Mission Support Public
Rules and Groups employed by this XCCDF Profile
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SRG-NET-000371-VPN-001640
Group -
AOS, when used as an IPsec VPN Gateway, must specify Perfect Forward Secrecy (PFS) during Internet Key Exchange (IKE) negotiation.
PFS generates each new encryption key independently from the previous key. Without PFS, compromise of one key will compromise all communications. The phase 2 (Quick Mode) Security Association (SA)...Rule High Severity -
SRG-NET-000063-VPN-000220
Group -
AOS, when used as a VPN Gateway, must be configured to use IPsec with SHA-2 at 384 bits or greater for hashing to protect the integrity of remote access sessions.
Without strong cryptographic integrity protections, information can be altered by unauthorized users without detection. SHA-1 is considered a compromised hashing standard and is being phased out o...Rule Medium Severity -
SRG-NET-000164-VPN-000560
Group -
AOS, when used as a VPN Gateway and using public key infrastructure (PKI)-based authentication, must validate certificates by constructing a certification path (which includes status information) to an accepted trust anchor.
Without path validation, an informed trust decision by the relying party cannot be made when presented with any certificate not already explicitly trusted. To meet this requirement, the information...Rule Medium Severity -
SRG-NET-000317-VPN-001090
Group -
AOS, when used as an IPsec VPN Gateway, must use Advanced Encryption Standard (AES) encryption for the Internet Key Exchange (IKE) proposal to protect confidentiality of remote access sessions.
Without confidentiality protection mechanisms, unauthorized individuals may gain access to sensitive information via a remote access session. Remote access is access to DOD nonpublic information s...Rule High Severity -
SRG-NET-000352-VPN-001460
Group -
AOS, when used as a VPN Gateway, must use an approved Commercial Solution for Classified (CSfC) when transporting classified traffic across an unclassified network.
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 co...Rule Medium Severity
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