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Tag: security

Security

detect-secrets – detect and prevent secrets in source code

September 9, 2026 Steve Emms CLI, Security

detect-secrets helps teams detect and prevent credentials from entering source code using baselines, plugins, filters and Git hooks.

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Wi-Fi image

Fluxion – Wireless Security Auditing Tool

September 8, 2026 Steve Emms Security

Fluxion is a terminal-based security auditing tool for evaluating WPA and WPA2 network exposure through controlled captive-portal testing.

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Security

Gitleaks – detect secrets in Git repositories and files

September 8, 2026 Steve Emms CLI, Security

Gitleaks scans Git repositories, files and standard input for passwords, API keys, tokens and other hard-coded secrets in source code.

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Wi-Fi Internet

hcxtools – Analyze Wi-Fi Capture and Hash Files

September 8, 2026 Steve Emms CLI, Security

hcxtools is a command-line suite for converting, filtering and analysing wireless captures and authentication hashes during authorised security assessments.

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mCaptcha – privacy-respecting proof-of-work CAPTCHA

September 6, 2026 Steve Emms Web Apps

mCaptcha is a privacy-respecting CAPTCHA system that uses proof-of-work and adaptive difficulty to protect websites without image puzzles.

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Cap – lightweight privacy-focused CAPTCHA

September 6, 2026 Steve Emms Web Apps

Cap is a lightweight, self-hosted CAPTCHA alternative using proof-of-work and browser instrumentation.

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ALTCHA – privacy-first CAPTCHA alternative

September 5, 2026 Steve Emms Web Apps

ALTCHA is a self-hosted, privacy-focused CAPTCHA alternative using proof-of-work to protect websites from bots, spam and abuse.

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Security

11 Best Open Source Firewall Distributions

August 21, 2026 Steve Emms Distro, Roundup, Security, System Software

Security is paramount. Security involves defense in depth. Approaching security one step at a time, with consistency and rigour, you can mitigate threats.

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Network Security

12 Best Free and Open Source Linux Terminal-Based Port Scanners

August 15, 2026 Steve Emms CLI, Internet, Roundup, Security, System Software

Linux has a good range of port scanners that help administrators identify and rectify weaknesses in a system.

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Vulnerability Detection

17 Best Free and Open Source Vulnerability Detection Tools

August 9, 2026 Steve Emms Roundup, Security

Vulnerability scanning is an essential activity for enterprise security. We recommend the best free and open source vulnerability detection tools.

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Security

14 Best Free and Open Source Firewall Tools

August 1, 2026 Steve Emms Roundup, Security, System Software

We recommend free and open source firewall tools.

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Server

12 Best Free and Open Source Single Sign-On Software

July 27, 2026 Steve Emms Internet, Roundup

Single Sign-On is an authentication process that allows users to log in to multiple independent applications with a single set of credentials.

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Intrusion Detection

12 Best Free and Open Source Host-Based Intrusion Detection Systems

July 16, 2026 Steve Emms Roundup, Security

An intrusion detection system is a device or software application that monitors a network or systems for malicious activity or policy violations.

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Passive OS Fingerprinting

7 Best Free and Open Source Passive OS Fingerprinting Tools

July 5, 2026 Steve Emms Roundup, Security

Passive OS Fingerprinting Tools rely on sniffing techniques to analyze the information sent in normal network traffic.

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Intrusion Prevention - SSH

8 Best Free and Open Source Tools for SSH Intrusion Prevention

July 4, 2026 Steve Emms Internet, Roundup, System Software

This article recommends open source software that employ different techniques to make it harder for a server running SSH to be compromised.

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Password Managers

22 Best Free and Open Source Linux GUI Password Managers

May 27, 2026 Steve Emms Roundup, Utilities

A password manager is a utility which helps users store and retrieve passwords and other data. We make our open source recommendations.

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Encryption

10 Best Free and Open Source Linux Disk Encryption Tools

April 28, 2026 Steve Emms Internet, Roundup, Security, System Software

Keep your data safe. There are many different useful tools that offer disk encryption. We recommend the best free and open source solutions.

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Security

16 Best Free and Open Source Linux Digital Forensics Tools

April 24, 2026 Steve Emms Roundup, Security, System Software

Digital forensics is a specialist art. It allows investigations to be undertaken without modifying the media.

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Cloud storage

Falco – cloud native runtime security tool

October 22, 2025 Steve Emms Internet, Security

Falco is a cloud native runtime security tool that detects and alerts on abnormal behavior and potential security threats in real-time.

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Email

Common Email Security Mistakes and How to Avoid Them

August 28, 2025 John O'Donnell Security

Let’s talk through some of the most common mistakes people make with email security and how to avoid falling into the same traps.

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