Profile Applicability:
 • Level 1

Description:
 firewalld is a dynamic firewall manager that provides a flexible way to manage firewall rules and zones. Ensuring firewalld is installed allows for effective network traffic control and enhances system security.

Rationale:
 Having firewalld installed enables administrators to implement granular firewall policies that protect against unauthorized network access.

Impact:
 Pros:

  • Provides a modern, flexible firewall management tool.

  • Supports dynamic firewall rule changes without service disruption.

Cons

  • Installation alone does not guarantee secure configuration; proper setup is necessary.

Default Value:
 firewalld may or may not be installed by default, depending on the Linux distribution.

Pre-requisites:

  • Root or sudo privileges to install packages.

Remediation:

Test Plan:

Using Linux command line:

1. Check if firewalld is installed:

RPM-based systems:

rpm -q firewalld

2. Confirm package presence.

Implementation Plan:

Using Linux command line:

Install firewalld if missing:

1. RPM-based:

yum install firewalld -y

2. Verify installation:

firewall-cmd --version

Backout Plan:

Using Linux command line:

1. Remove firewalld if needed:

RPM-based:

yum remove firewalld -y

2. Confirm removal.

References: