Oracle Linux 9 Security Technical Implementation Guide

The Oracle Linux 9 Security Technical Implementation Guide (V1 R7) has 450 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 · R7

CurrentPublished Wed Sep 30 2026

OL 9 must configure a DNS processing mode set be Network Manager.

Oracle Linux 9 Security Technical Implementation Guide

Assessment Title

Rule Text

OL 9 must configure a DNS processing mode set be Network Manager.

Description

Discussion Text

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-271860

Rule

SV-271860r1092292_rule

Severity

medium

Rule Version

OL09-00-006002

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify that OL 9 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 OL 9 to use a DNS mode.

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

dns = none

NetworkManager must be reloaded for the change to take effect.

$ sudo systemctl reload NetworkManager

STIG check 418 of 450 in the Oracle Linux 9 STIG checklist

← Previous · V-271859OL 9 wireless network adapters must be disabled.Next · V-271861 →OL 9 systems using Domain Name Servers (DNS) resolution must have at least two name servers configured.