Red Hat Enterprise Linux 9 Security Technical Implementation Guide

The Red Hat Enterprise Linux 9 Security Technical Implementation Guide (V2 R10) has 445 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

V2 · R10

CurrentPublished Wed Sep 30 2026

RHEL 9 must disable network management of the chrony daemon.

Red Hat Enterprise Linux 9 Security Technical Implementation Guide

Assessment Title

Rule Text

RHEL 9 must disable network management of the chrony daemon.

Description

Discussion Text

Not exposing the management interface of the chrony daemon on the network diminishes the attack space.

Satisfies: SRG-OS-000096-GPOS-00050, SRG-OS-000095-GPOS-00049

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

Objective

V-257947

Rule

SV-257947r958480_rule

Severity

low

Rule Version

RHEL-09-252030

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify RHEL 9 disables network management of the chrony daemon with the following command:

$ grep -w cmdport /etc/chrony.conf

cmdport 0

If the "cmdport" option is not set to "0", is commented out, or is missing, this is a finding.

Implementation Procedure

Fix Text

Configure RHEL 9 to disable network management of the chrony daemon by adding/modifying the following line in the /etc/chrony.conf file:

cmdport 0

STIG check 165 of 445 in the Red Hat Enterprise Linux 9 STIG checklist

← Previous · V-257946RHEL 9 must disable the chrony daemon from acting as a server.Next · V-257948 →RHEL 9 systems using Domain Name Servers (DNS) resolution must have at least two name servers configured.