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Disable SSH Server If Possible

An XCCDF Rule

Description

The SSH server service, sshd, is commonly needed. However, if it can be disabled, do so. This is unusual, as SSH is a common method for encrypted and authenticated remote access.
ID
xccdf_org.ssgproject.content_rule_service_sshd_disabled
Severity
High
References
Updated

Remediation Templates

An Ansible Snippet

- name: Block Disable service sshd
  block:
  - name: Disable service sshd
    block:

    - name: Disable service sshd

A Kubernetes Patch

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

OS Build Blueprint

[customizations.services]
disabled = ["sshd"]

A Shell Script

# Remediation is applicable only in certain platforms
if [ ! -f /.dockerenv ] && [ ! -f /run/.containerenv ]; then
SYSTEMCTL_EXEC='/usr/bin/systemctl'
"$SYSTEMCTL_EXEC" stop 'sshd.service'
"$SYSTEMCTL_EXEC" disable 'sshd.service'
"$SYSTEMCTL_EXEC" mask 'sshd.service'

A Puppet Snippet

include disable_sshd
class disable_sshd {
  service {'sshd':
    enable => false,
    ensure => 'stopped',
  }
}