Communications from AD admin platforms must be blocked, except with the domain controllers being managed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-44058	AD.MP.0004	SV-56888r2_rule	ECSC-1	Medium

Description
AD admin platforms are used for highly privileged activities. Preventing communications to and from AD admin platforms, except with the domain controllers being managed, protects against an attacker's lateral movement from a compromised platform. Requirements in Firewall and Windows client STIGs restrict inbound communications, however outbound communications must be restricted as well to prevent inadvertent exposure of the privileged credentials used on these platforms.

Description

AD admin platforms are used for highly privileged activities. Preventing communications to and from AD admin platforms, except with the domain controllers being managed, protects against an attacker's lateral movement from a compromised platform. Requirements in Firewall and Windows client STIGs restrict inbound communications, however outbound communications must be restricted as well to prevent inadvertent exposure of the privileged credentials used on these platforms.

STIG	Date
Active Directory Domain Security Technical Implementation Guide (STIG)	2014-12-18

Details

Check Text ( C-49473r3_chk )
Verify firewall rules prevent outbound communications from AD admin platforms, except for domain controllers being managed. If outbound communications are allowed between AD admin platforms and any other systems other than domain controllers, this is a finding.

Fix Text (F-49678r3_fix)
Maintain firewall rules to prevent outbound communications from AD admin platforms, except with domain controllers being managed.