Virtual Private Network (VPN) Security Requirements Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The remote access VPN Gateway must use a digital signature generated using FIPS-validated algorithms and an approved hash function to protect the integrity of TLS remote access sessions.
Without integrity protection, unauthorized changes may be made to the log files and reliable forensic analysis and discovery of the source of malicious system activity may be degraded. Remote acce...Rule Medium Severity -
SRG-NET-000063
Group -
SRG-NET-000074
Group -
The IPSec VPN must be configured to use a Diffie-Hellman (DH) Group of 16 or greater for Internet Key Exchange (IKE) Phase 1.
Use of an approved DH algorithm ensures the IKE (Phase 1) proposal uses FIPS-validated key management techniques and processes in the production, storage, and control of private/secret cryptographi...Rule High Severity -
SRG-NET-000075
Group -
If the site-to-site VPN implementation uses L2TP, L2TPv3 sessions must be authenticated prior to transporting traffic.
L2TPv3 sessions can be used to transport layer-2 protocols across an IP backbone. These protocols were intended for link-local scope only and are therefore less defended and not as well-known. As s...Rule Medium Severity -
SRG-NET-000077
Group -
The VPN Gateway must generate log records containing information to establish what type of events occurred.
Without establishing what type of event occurred, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. VPN gateways often have a separate au...Rule Low Severity -
SRG-NET-000078
Group -
The VPN Gateway must generate log records containing information to establish when (date and time) the events occurred.
Without establishing when events occurred, it is impossible to establish, correlate, and investigate the events leading up to an outage or attack. VPN gateways often have a separate audit log for ...Rule Low Severity
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