Skip to content
Log In

Disable DHCP Service

An XCCDF Rule

Description

The dhcpd service should be disabled on any system that does not need to act as a DHCP server. The dhcpd service can be disabled with the following command: 
$ sudo systemctl mask --now dhcpd.service

Rationale

Unmanaged or unintentionally activated DHCP servers may provide faulty information to clients, interfering with the operation of a legitimate site DHCP server if there is one.

ID
xccdf_org.ssgproject.content_rule_service_dhcpd_disabled
Severity
Medium
References
Updated

Remediation Templates

A Shell Script

# Remediation is applicable only in certain platforms
if rpm --quiet -q kernel; then
SYSTEMCTL_EXEC='/usr/bin/systemctl'
"$SYSTEMCTL_EXEC" stop 'dhcpd.service'
"$SYSTEMCTL_EXEC" disable 'dhcpd.service'
"$SYSTEMCTL_EXEC" mask 'dhcpd.service'

OS Build Blueprint

[customizations.services]
masked = ["dhcpd"]

A Kubernetes Patch

apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
spec:
  config:
    ignition:
      version: 3.1.0

script:kickstart

service disable dhcpd

An Ansible Snippet

- name: Gather the package facts
  package_facts:
    manager: auto
  tags:
  - CCE-82864-0
  - NIST-800-53-CM-6(a)

A Puppet Snippet

include disable_dhcpd
class disable_dhcpd {
  service {'dhcpd':
    enable => false,
    ensure => 'stopped',
  }
}