Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

The Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide (V1 R2) has 391 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R2

CurrentPublished Wed Sep 30 2026

TOSS 5 must configure a DNS processing mode set in Network Manager.

Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

Assessment Title

Rule Text

TOSS 5 must configure a DNS processing mode set in Network Manager.

Description

Discussion Text

In order to ensure that DNS resolver settings are respected, a DNS mode in Network Manager must be configured.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-282679

Rule

SV-282679r1201334_rule

Severity

medium

Rule Version

TOSS-05-000205

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify TOSS 5 has a DNS mode configured in Network Manager.

$ NetworkManager --print-config
[main]
dns=none

If the dns key under main does not exist or is not set to "none" or "default", this is a finding.

Implementation Procedure

Fix Text

Configure NetworkManager in TOSS 5 to use a DNS mode.

In "/etc/NetworkManager/NetworkManager.conf" add the following line in the "[main]" section:

dns = none

Reload NetworkManager for the change to take effect.

$ sudo systemctl reload NetworkManager

STIG check 305 of 391 in the Tri-Lab Operating System Stack (TOSS) 5 STIG checklist

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