Checklist Summary:

The Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide (STIG) is published as a tool to improve the security of Department of Defense (DOD) information systems. The requirements were developed from the General Purpose Operating System Security Requirements Guide (GPOS SRG). The vulnerabilities discussed in this document are applicable to TOSS 4 Server installations. This document is meant for use in conjunction with the Enclave, Network Infrastructure, Secure Remote Computing, and appropriate application STIGs.

Checklist Role:

• Operating System

Known Issues:

Not provided.

Target Audience:

Not provided.

Target Operational Environment:

• Managed
• Specialized Security-Limited Functionality (SSLF)

Testing Information:

Not provided.

Regulatory Compliance:

DoD Instruction (DoDI) 8500.01

Comments/Warnings/Miscellaneous:

Comments or proposed revisions to this document should be sent via email to the following address: [email protected]. DISA will coordinate all change requests with the relevant DOD organizations before inclusion in this document. Approved changes will be made in accordance with the DISA maintenance release schedule.

Disclaimer:

Not provided.

Product Support:

Not provided.

Point of Contact:

[email protected]

Sponsor:

Not provided.

Licensing:

Not provided.

Change History:

new checklist - 7/25/23
Change to NEW - 8/28/23
Updated resource per DISA - 10/26/23
updated URLs - 1/26/24
Updated Version, Resources and SHA - 08/08/2024
Resource Title Updated, Resource Sunset - 08/21/2024
Updated Checklist Version and Resources - 12/09/24
Updated Checklist Title and SCAP 1.3 Resource - 12/12/2024 
Updated General Summary - 08/20/2025
Updated Version, Resources, General - 11/24/2025

Dependency/Requirements:

URL	Description

References:

Reference URL	Description

NIST checklist record last modified on 11/24/2025