ftester

Tool for testing firewalls and Intrusion Detection System (IDS)

Matches ATT&CK tactic: Stealth ↗

Platforms: Linux · Last verified September 6, 2026

The Firewall Tester (FTester) is a tool designed for testing firewall filtering policies and Intrusion Detection System (IDS) capabilities.

Only use this tool against systems you own or are explicitly authorized to test — see the disclaimer.

Getting started

See the official Kali tool page and upstream homepage linked above for installation and usage details.

Debian-based distribution built for penetration testing and security auditing