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Category: Security

Bioinformatics

minimap2 – versatile sequence alignment program

March 18, 2026 Steve Emms Security

minimap2 is a versatile sequence alignment program for genomic and spliced nucleotide sequences.

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Security

tirith – URL security analysis for shell environments

March 16, 2026 Steve Emms CLI, Security

Tirith guards the gate and intercepts suspicious URLs, ANSI injection, and pipe-to-shell attacks before they execute.

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Security

PicoForge – configure and manage Pico FIDO security keys

March 13, 2026 Steve Emms GUI, Security

PicoForge is a modern desktop application for configuring and managing Pico FIDO security keys. Written in Rust and built with GPUI

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Security

9 Best Open Source Firewall Distributions

March 13, 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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Security

Bao – verified streaming tool

March 11, 2026 Steve Emms CLI, Security

Bao is an implementation of BLAKE3 verified streaming, as described in Section 6.4 of the BLAKE3 spec.

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DNA

Cryfa – encryption tool for genomic data

March 11, 2026 Steve Emms CLI, Scientific, Security

Cryfa is an encryption tool specifically designed for genomic data.

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Network Security

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

March 10, 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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Security

Nibble – local network scanning tool

March 10, 2026 Steve Emms CLI, Security, TUI

Nibble is a CLI tool for local network scanning that focuses on speed and ease of use.

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Security

11 Useful Free and Open Source Linux Reverse Vulnerability Analysis Tools

March 7, 2026 Steve Emms Roundup, Security

Vulnerability analysis is an essential activity for enterprise security. We recommend useful open source tools.

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Security

8 Best Free and Open Source Network Intrusion Detection Systems

March 7, 2026 Steve Emms Internet, 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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Network Security

ddgst – hashing and checksum utility

March 5, 2026 Steve Emms CLI, Security

ddgst is a cross-platform command-line hashing and checksum utility written in the D programming language.

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Network Analyzers

18 Best Free and Open Source Network Analyzers

March 5, 2026 Steve Emms Internet, Roundup, Security

A network analyzer (also known as a packet analyzer, packet sniffer, or protocol analyzer) is software that intercepts and logs traffic that passes over a computer network or part of a network.

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Encryption

5 Best Free and Open Source Frontends for GnuPG

March 4, 2026 Steve Emms Roundup, Security

GnuPG is a superb tool though it’s a command line affair. If you’re looking for a GUI frontend, check out these tools.

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Vulnerability Detection

14 Best Free and Open Source Vulnerability Detection Tools

March 1, 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

ZGrab – application-layer network scanner

March 1, 2026 Steve Emms CLI, Security

ZGrab is a fast, modular application-layer network scanner designed for completing large Internet-wide surveys.

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Encrypted Files

nacrypt – file encryption program

February 27, 2026 Steve Emms CLI, Security

Nacrypt is designed to be safe by design, using secure defaults for all cryptographic operations.

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Network Analyzers

babyshark – flows-first packet capture TUI

February 26, 2026 Steve Emms Security, TUI

Babyshark is a PCAP TUI that helps you answer: What’s using the network? What looks broken/weird? What should I select next?

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Security

12 Best Free and Open Source Firewall Tools

February 26, 2026 Steve Emms Roundup, Security, System Software

We recommend free and open source firewall tools.

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Security

nftables – in-kernel packet classification framework

February 26, 2026 Steve Emms Security

nftables replaces the popular {ip,ip6,arp,eb}tables. This software also provides libnftables.

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Security

firewalld – dynamically managed firewall

February 26, 2026 Steve Emms Security

firewalld provides a dynamically managed firewall with support for network/firewall zones.

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