The ISSO/NSO will ensure the route to the AG network adheres to the PPS CAL boundary 13 and 14 policies and is in compliance with all perimeter filtering defined in the perimeter and router sections of the Network STIG.

From Perimeter Router Security Technical Implementation Guide

Part of AG must adhere to PPS boundary 13 and 14 policies

SV-15257r2_rule The ISSO/NSO will ensure the route to the AG network adheres to the PPS CAL boundary 13 and 14 policies and is in compliance with all perimeter filtering defined in the perimeter and router sections of the Network STIG.

Vulnerability discussion

The enclave perimeter requirement for filtering, to include JTF-GNO PPS filtering rules, and monitoring traffic will be enforced for any traffic from the AG. All traffic entering the enclave from the AG must enter through the firewall and be monitored by internal IDS. All traffic leaving the enclave, regardless of the destination--AG or NIPRNet addresses, will be filtered by the premise router's egress filter to verify that the source IP address belongs to the enclave.

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The enclave perimeter requirement for filtering, to include JTF-GNO PPS filtering rules, and monitoring traffic will be enforced for any traffic from the AG. All traffic leaving the enclave, regardless of the destination--AG or NIPRNet addresses, will be filtered by the premise router's egress filter to verify that the source IP address belongs to the enclave. Note: An Approved Gateway (AG) is any external connection from a DoD NIPRNet enclave to an Internet Service Provider, or network owned by a contractor, or non-DoD federal agency that has been approved by either the DoD CIO or the DoD Component CIO. This AG requirement does not apply to commercial cloud connections when the Cloud Service Provider (CSP) network is connected via the NIPRNet Boundary Cloud Access Point (BCAP).

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Ensure the perimeter is protected from this path. A deny by default policy is enforced at this connection and the site is in compliance with all PPS 13 and 14 boundaries.

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