Check: NET0351
Network Infrastructure Policy STIG:
NET0351
(in versions v10 r6 through v9 r2)
Title
When protecting the boundaries of a network, the firewall must be placed between the private network and the perimeter router and the Demilitarized Zone (DMZ). (Cat II impact)
Discussion
The only way to mediate the flow of traffic between the inside network, the outside connection, and the DMZ is to place the firewall into the architecture in a manner that allows the firewall the ability to screen content for all three destinations.
Check Content
Review the network topology diagrams and visually inspect the firewall location to validate correct position on the network. If the firewall is not positioned between the perimeter router and the private network and between the perimeter router and the DMZ, this is a finding. Exception: If the perimeter security for the enclave or B/C/P/S is provisioned via the JRSS, then this requirement is not applicable.
Fix Text
Move the firewall into the prescribed location to allow for enforcement of the Enclave Security Policy and allow for all traffic to be screened.
Additional Identifiers
Rule ID: SV-251366r853652_rule
Vulnerability ID: V-251366
Group Title: NET0351
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000262 |
The organization prohibits the direct connection of an organization-defined unclassified, national security system to an external network without the use of an organization-defined boundary protection device. |
CCI-002073 |
The organization defines the boundary protection device to be used to connect organization-defined unclassified, national security systems to an external network. |
CCI-002103 |
The organization documents, for each internal connection, the interface characteristics. |