HPE Aruba Networking AOS VPN Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-NET-000345-VPN-002430
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AOS, when used as a VPN Gateway, must not accept certificates that have been revoked when using PKI for authentication.
Situations may arise in which the certificate issued by a certificate authority (CA) may need to be revoked before the lifetime of the certificate expires (for example, when the certificate is know...Rule High Severity -
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 -
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 -
AOS, when used as a VPN Gateway, must authenticate all network-connected endpoint devices before establishing a connection.
Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. For distributed architectures (e.g., service-oriented architectures), th...Rule Medium Severity -
AOS, when used as a VPN Gateway, must terminate all network connections associated with a communications session at the end of the session.
Idle Transmission Control Protocol (TCP) sessions can be susceptible to unauthorized access and hijacking attacks. By default, routers do not continually test whether a previously connected TCP end...Rule Low Severity -
AOS, when used as a VPN Gateway, must limit the number of concurrent sessions for user accounts to one or to an organization-defined number.
VPN gateway management includes the ability to control the number of users and user sessions that utilize a VPN gateway. Limiting the number of allowed users and sessions per user is helpful in lim...Rule Medium Severity -
The VPN Gateway must uniquely identify and authenticate organizational users (or processes acting on behalf of organizational users).
To ensure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational user...Rule Medium Severity -
The Remote Access VPN Gateway must terminate remote access network connections after an organization-defined time period.
This requirement is in response to the DOD Office of Inspector General Audit of Maintaining Cybersecurity in the Coronavirus Disease-2019 Telework Environment. Best practice is to terminate inacti...Rule Medium Severity -
AOS, when used as a VPN Gateway, must renegotiate the security association after 24 hours or less or as defined by the organization.
When a VPN gateway creates an IPsec security association (SA), resources must be allocated to maintain the SA. These resources are wasted during periods of IPsec endpoint inactivity, which could re...Rule Medium Severity
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