πŸ”₯

Firewall & Network Security

Replaces: Cisco, proprietary

Open-source firewall and network security solutions for businesses and individuals. Powerful alternatives to Cisco and proprietary solutions.

πŸ›‘οΈ 23 Open Source Tools

pfSense CE

Powerful open-source firewall and router distribution

5.0k
↳ Cisco ASA proprietary firewalls
Apache-2.0 ●●● Advanced
Mar 2026

OPNsense

Modern FreeBSD-based firewall with weekly updates

3.4k
↳ Cisco ASA proprietary firewalls
BSD-2-Clause ●●● Advanced
May 2026

CrowdSec

Collaborative open-source security through crowd intelligence

9.2k
↳ Cisco ASA proprietary firewalls
MIT ●● Medium
May 2026

Fail2ban

Automatic protection against brute-force attacks

12.0k
↳ Cisco ASA proprietary firewalls
GPL-2.0 ● Easy
May 2026

UFW

Uncomplicated firewall for simple Linux server security

900
↳ Cisco ASA proprietary firewalls
GPL-3.0 ● Easy
Dec 2012

Snort

World-leading open-source intrusion detection system

6.2k
↳ Cisco ASA proprietary firewalls
GPL-2.0 ●●● Advanced
Apr 2026

Suricata

High-performance IDS/IPS with multi-threading architecture

5.1k
↳ Cisco ASA proprietary firewalls
GPL-2.0 ●●● Advanced
May 2026

OpenSnitch

Application firewall for Linux desktops

11.0k
↳ Cisco ASA proprietary firewalls
GPL-3.0 ●● Medium
Apr 2026

Super

SPR: Open Source, secure, user friendly and fast wifi routers for your home.

502
↳ Cisco proprietary
BSD-3-Clause ●● Medium
May 2026

Safeline

SafeLine is a self-hosted WAF(Web Application Firewall) / reverse proxy to protect your web apps from…

21.2k
↳ Cisco proprietary
GPL-3.0 ●● Medium
May 2026

Pentagi

Fully autonomous AI Agents system capable of performing complex penetration testing tasks

16.6k
↳ Cisco proprietary
MIT ●●● Advanced
May 2026

Portmaster

Love Freedom - ❌ Block Mass Surveillance

12.6k
↳ Cisco proprietary
GPL-3.0 ●● Medium
May 2026

Simplewall

Simple tool to configure Windows Filtering Platform (WFP) which can configure network activity on your…

8.4k
↳ Cisco proprietary
GPL-3.0 ● Easy
Apr 2026

Whoami Project

Whoami provides enhanced privacy, anonymity for Debian and Arch based linux distributions

2.3k
↳ Cisco proprietary
GPL-3.0 ●● Medium
Oct 2025

Privacy Settings

Guide to privacy settings for most major software and services.

1.9k
↳ Cisco proprietary
MIT ●● Medium
May 2026

Core

A privacy-preserving home security camera that uses advanced end-to-end encryption.

1.1k
↳ Cisco proprietary
GPL-3.0 ●●● Advanced
May 2026

Wholeaked

a file-sharing tool that allows you to find the responsible person in case of a leakage

1.1k
↳ Cisco proprietary
BSD-3-Clause ●● Medium
Jan 2022

Clearcam

Add object detection, tracking, mobile notifications, and search to any security camera.

680
↳ Cisco proprietary
GPL-3.0 ●● Medium
May 2026

Strix

Smart IP camera stream finder. Tests 102K+ URL patterns in 30 seconds. Supports 67K camera models.…

673
↳ Cisco proprietary
MIT ●● Medium
Apr 2026

Athena

Athena is a Material You (Material 3) firewall and ad blocker that works seamlessly on both rooted and…

621
↳ Cisco proprietary
GPL-3.0 ●● Medium
Jan 2026

Windows On Reins

Wor is a Powershell script to harden, debloat, optimize, enhance privacy, avoid fingerprinting and improve…

472
↳ Cisco proprietary
GPL-3.0 ●● Medium
Jun 2025

Macos Fortress

Firewall and Privatizing Proxy for Trackers, Attackers, Malware, Adware, and Spammers with Anti-Virus…

449
↳ Cisco proprietary
MIT ● Easy
Nov 2021

Local Sheriff

Think of Local sheriff as a recon tool in your browser (WebExtension).

309
↳ Cisco proprietary
GPL-3.0 ●● Medium
Dec 2022