The ALG providing user authentication intermediary services must restrict user authentication traffic to specific authentication server(s).

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-204947	SRG-NET-000138-ALG-000089	SV-204947r395976_rule		Medium

Description

User authentication can be used as part of the policy filtering rule sets. Some URLs or network resources can be restricted to authenticated users only. Users are prompted by the application or browser for credentials. Authentication service may be provided by the ALG as an intermediary for the application; however, the authentication credential must be stored in the site's directory services server. This requirement only applies to components where this is specific to the function of the device or has the concept of an organizational user (e.g., proxy capability). This does not apply to authentication for the purpose of configuring the device itself (i.e., device management).

STIG	Date
Application Layer Gateway Security Requirements Guide	2024-12-04

Details

Check Text (C-5215r395974_chk)

If the ALG does not provide user authentication intermediary services, this is not applicable.

Verify the ALG is configured to use a specific authentication server(s).

If the ALG does not restrict user authentication traffic to a specific authentication server(s), this is a finding.

Fix Text (F-5215r395975_fix)

If user authentication intermediary services are provided, configure the ALG to use a specific authentication server(s).