STIGQter: STIG Summary: Application Layer Gateway Security Requirements Guide Version: 2 Release: 4 Benchmark Date: 01 Jul 2026:

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

DISA Rule

SV-204947r395976_rule

Vulnerability Number

V-204947

Group Title

SRG-NET-000138

Rule Version

SRG-NET-000138-ALG-000089

Severity

CAT II

CCI(s)

• CCI-000764 - Uniquely identify and authenticate organizational users and associate that unique identification with processes acting on behalf of those users.

Weight

10

Fix Recommendation

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

Check Contents

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.

Vulnerability Number

V-204947

Documentable

False

Rule Version

SRG-NET-000138-ALG-000089

Severity Override Guidance

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.

Check Content Reference

M

Target Key

2904