Install iptables-persistent Package

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Description

The iptables-persistent package can be installed with the following command:


$ apt-get install iptables-persistent

Rationale

A method of configuring and maintaining firewall rules is necessary to configure a Host Based Firewall.

Remediation

Shell script

The following script can be run on the host to remediate the issue.

#!/bin/bash

# Remediation is applicable only in certain platforms
if dpkg-query --show --showformat='${db:Status-Status}\n' 'iptables' 2>/dev/null | grep -q installed; then

DEBIAN_FRONTEND=noninteractive apt-get install -y "iptables-persistent"

else
    >&2 echo 'Remediation is not applicable, nothing was done'
fi

Ansible playbook

The following playbook can be run with Ansible to remediate the issue.

- name: Gather the package facts
  package_facts:
    manager: auto
  tags:
  - enable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - package_iptables-persistent_installed

- name: Ensure iptables-persistent is installed
  package:
    name: iptables-persistent
    state: present
  when: '"iptables" in ansible_facts.packages'
  tags:
  - enable_strategy
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed
  - package_iptables-persistent_installed