FIRE-4520 - Configuration warnings in pf firewall

This information is provided as part of the Lynis community project. It is related to Lynis control FIRE-4520 and should be considered as-is and without guarantees. Any advice and commands should be tested before implementing them in production environments.

Control details
CategoryNetworking
Application

Description

Lynis uses the built-in check of pf to determine if the configuration has any warnings. When the utility shows any, Lynis will trigger this control.

How to solve

Run pfctl in verbose mode (-vvv) and the -n option to check your configuration file. More extensive tests can be done with the Lynis Enterprise plugins and interface.

Need more details?

Consider the upgrade to Lynis Enterprise to receive additional details and guidance. The Enterprise version helps to you with daily health checks of your environment, learn in-depth system hardening, and resources to protect your systems better.

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About

Lynis is a technical security auditing tool for Unix flavors like Linux, macOS, AIX, Solaris, and *BSD. It is open source software and free to use. Typical usage include system hardening, compliance testing, and vulnerability scanning. The project has an active community, including development via GitHub.

Lynis Enterprise

Do you need to collect data from multiple systems or compliance reporting? Lynis Enterprise uses Lynis to collect the data and make your work easier.

Benefits: automate security audits, detailed reporting, compliance testing.

  • Centralized management
  • Improvement plan with priorities
  • Reporting
  • Dashboards
  • Predefined policies
  • Integration (API)
  • Improvement snippets for tools like Ansible, Chef, Cfengine, Puppet, and SaltStack
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