The ALG must be configured to remove or disable unrelated application proxy services.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
SRG-NET-000131-ALG-000086	SRG-NET-000131-ALG-000086	SRG-NET-000131-ALG-000086_rule		Medium

Description
Unrelated proxy services increase the attack vector and add excessive complexity to the securing of the ALG. Multiple application proxies can be installed on many ALGs. However, proxy types must be limited to related functions. At a minimum, the web and email gateway represent different security domains/trust levels. Organizations should also consider separation of gateways that service the DMZ and the trusted network.

Description

Unrelated proxy services increase the attack vector and add excessive complexity to the securing of the ALG. Multiple application proxies can be installed on many ALGs. However, proxy types must be limited to related functions. At a minimum, the web and email gateway represent different security domains/trust levels. Organizations should also consider separation of gateways that service the DMZ and the trusted network.

STIG	Date
Application Layer Gateway Security Requirements Guide	2014-06-27

Details

Check Text ( C-SRG-NET-000131-ALG-000086_chk )
Review the ALG configuration to determine if application proxies are instated which are not related to the mission of the gateway. If the ALG has unrelated application proxy services installed, this is a finding.

Fix Text (F-SRG-NET-000131-ALG-000086_fix)
Remove application proxy services that are unrelated to the primary function of the ALG.