The VPN Gateway must ensure inbound and outbound traffic is configured with a security policy in compliance with information flow control policies.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-207184	SRG-NET-000019-VPN-000040	SV-207184r695317_rule		Medium

Description
Unrestricted traffic may contain malicious traffic which poses a threat to an enclave or to other connected networks. Additionally, unrestricted traffic may transit a network, which uses bandwidth and other resources. VPN traffic received from another enclave with different security policy or level of trust must not bypass be inspected by the firewall before being forwarded to the private network.

Description

Unrestricted traffic may contain malicious traffic which poses a threat to an enclave or to other connected networks. Additionally, unrestricted traffic may transit a network, which uses bandwidth and other resources. VPN traffic received from another enclave with different security policy or level of trust must not bypass be inspected by the firewall before being forwarded to the private network.

STIG	Date
Virtual Private Network (VPN) Security Requirements Guide	2023-05-04

Details

Check Text ( C-7444r695316_chk )
Verify the VPN Gateway has an inbound and outbound traffic security policy which is in compliance with information flow control policies (e.g., IPsec policy configuration). Review network device configurations and topology diagrams. Verify encapsulated or encrypted traffic received from other enclaves with different security policies terminate at the perimeter for filtering and content inspection by a firewall and IDPS before gaining access to the private network. If the IPsec VPN Gateway does not use Encapsulating Security Payload (ESP) in tunnel mode for establishing secured paths to transport traffic between the organizations sites or between a gateway and remote end-stations, this is a finding,

Check Text ( C-7444r695316_chk )

Verify the VPN Gateway has an inbound and outbound traffic security policy which is in compliance with information flow control policies (e.g., IPsec policy configuration).

Review network device configurations and topology diagrams. Verify encapsulated or encrypted traffic received from other enclaves with different security policies terminate at the perimeter for filtering and content inspection by a firewall and IDPS before gaining access to the private network.

If the IPsec VPN Gateway does not use Encapsulating Security Payload (ESP) in tunnel mode for establishing secured paths to transport traffic between the organizations sites or between a gateway and remote end-stations, this is a finding,

Fix Text (F-7444r378174_fix)
Configure the VPN Gateway to ensure inbound and outbound traffic is configured with a security policy in compliance with information flow control policies (e.g., IPsec policy configuration). Also, configure the VPN gateway to forward encapsulated or encrypted traffic received from other enclaves with different security policies to the perimeter firewall and IDPS before traffic is passed to the private network.

Fix Text (F-7444r378174_fix)

Configure the VPN Gateway to ensure inbound and outbound traffic is configured with a security policy in compliance with information flow control policies (e.g., IPsec policy configuration). Also, configure the VPN gateway to forward encapsulated or encrypted traffic received from other enclaves with different security policies to the perimeter firewall and IDPS before traffic is passed to the private network.