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A fast reverse proxy to help you expose a local server behind a NAT or firewall to the internet.

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

DNS over HTTPS / DNS over Tor / DNSCrypt client, WireGuard proxifier, firewall, and connection tracker for Android.

No-root network monitor, firewall and PCAP dumper for Android

Lightweight, no vpn firewall solution for Android 11+

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. It has a robust event-based programming language which provides protection from a range of attacks against web applications and allows for HTTP traffic monitoring, logging and real-time analysis.

Open-source AI agent firewall for MCP security and agent egress. Scans mediated HTTP, MCP, A2A, and WebSocket traffic for exfiltration, SSRF, and prompt injection, and emits mediator-signed action receipts: verifiable audit evidence from outside the agent.

AI Agent Identity and Access Management and Inference Firewall

Personal Digital Firewall Ruleset for Surge on iOS & macOS

Utilize an integrated firewall to manage application components.

Web Application Firewall Testing Framework - Go version

AFWall+ (Android Firewall +) - iptables based firewall for Android

Fort Firewall for Windows

OpenSnitch is a GNU/Linux interactive application firewall inspired by Little Snitch.

Skynet — IPv4 firewall protection, threat feeds and traffic visibility for Asuswrt-Merlin. Manage your network through the WebUI or SSH.

LuLu is the free open-source macOS firewall

🛡️ Open-source and cloud-native Web Application Firewall (WAF)

OWASP Coraza WAF is a golang modsecurity compatible web application firewall library

Crowdsec bouncer written in golang for firewalls

OWASP Coraza middleware for Caddy. It provides Web Application Firewall capabilities

Cloudflare WAF (Web Application Firewall) rules + a script for their automatic updates. Block unwanted and malicious requests to enhance the security of your origin server!

Open source alternative to AWS. Elastic compute, block storage (non replicated), firewall and load balancer, managed Postgres, K8s, AI inference, and IAM services.

TinyWall is a free, non-intrusive, secure-by-default firewall for Windows.

Data-Shield IPv4 Blocklist Community provides an official, curated registry of IPv4 addresses identified as malicious. Updated continuously, this resource offers vital threat intelligence to bolster your Firewall and WAF instances,...

Zen protects your Node app against attacks with one line of code. Get peace of mind— at runtime.

ConfigServer Security & Firewall (CSF) - Robust linux iptables/nftables firewall & free ipset blocklist service.

Privacy isn’t default. Take it back with De1984 Firewall and Package Control

AI Agent Firewall

Android firewall app using Shizuku and VPN modes. and no root required. This app can block internet access of any other apps.

Self-hosted optimization, monitoring (NMS), and security audit tool for UniFi Networks. Includes Wi-Fi Optimizer for wireless health scoring and channel optimization, advanced DNS/VLAN/firewall security checks, config optimization suggestions, centralized WAN and LAN speed test server w/ L2 tracing, CM, ONT, SFP, 5G modem stats +more.​​​​​​​​​​​​​