The IAO/NSO will ensure that workstation clients’ real IPv4 addresses are not revealed to the public by implementing NAT on the firewall or the router.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-3005	NET0190	SV-3005r1_rule		Low

Description
NAT works well with the implementation of RFC 1918 addressing scheme, it also has the privacy benefit of hiding real internal addresses. An attacker can learn more about a site’s private network once it has discovered the real IP addresses of the hosts within.

STIG	Date
Perimeter L3 Switch Security Technical Implementation Guide	2016-12-22

Details

Check Text ( C-3436r1_chk )
Review the firewall or premise router configuration to determine if NAT has been implemented.

Fix Text (F-3030r1_fix)
Implement Network Address Translation (NAT) on the firewall or premise router for NIPRNet Enclaves.