Open Source Linux Web Application Firewalls (WAF)
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Web Application Firewalls (WAF) for Linux
View 12 business solutionsBrowse free open source Web Application Firewalls (WAF) and projects for Linux below. Use the toggles on the left to filter open source Web Application Firewalls (WAF) by OS, license, language, programming language, and project status.
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Enterprise-grade ITSM, for every businessFreshservice is an intuitive, AI-powered platform that helps IT, operations, and business teams deliver exceptional service without the usual complexity. Automate repetitive tasks, resolve issues faster, and provide seamless support across the organization. From managing incidents and assets to driving smarter decisions, Freshservice makes it easy to stay efficient and scale with confidence.
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MongoDB Atlas runs apps anywhereMongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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SKUDONET
SKUDONET Open Source Load Balancer and Web Application Firewall
SKUDONET Community Edition is an Open Source Load Balancer and Web Application Firewall (WAF) designed for Linux server environments. Formerly known as Zevenet, it is based on Debian 12.8, providing a stable and secure foundation for reliable application delivery and cybersecurity. This edition is suitable for Linux and Windows server deployments (not for mobile platforms), offering advanced Layer 4 and Layer 7 traffic management with support for up to 250,000 TCP requests per second (L4) and 70,000 HTTPS requests per second (L7). SKUDONET Community Edition includes a full REST JSON API for integration into on-premises or hybrid cloud infrastructures, and it is used in thousands of deployments worldwide. Documentation, administration guides, and API references are available at: https://www.skudonet.com/knowledge-base/ -
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CacheGuard Gateway
Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
Securing your network should not require an enterprise budget. CacheGuard is a free open-source network security appliance for startups and growing businesses that need serious protection without the complexity. Install CacheGuard-OS on any x86 machine or VM and get a complete security gateway in under an hour. No plug-ins, no compatibility issues. Everything works out of the box. CacheGuard-OS is not an app, it IS the OS. A fully custom network appliance operating system built from scratch over 20 years, now fully open source. One ISO includes: firewall, VPN, web antivirus, URL filtering, SSL inspection, WAF, reverse proxy, load balancer and QoS. Free for any number of users. Optional paid support available. Source code: https://github.com/cacheguard/CacheGuard-OS Website: https://www.cacheguard.com/ -
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ModSecurity
Cross platform web application firewall (WAF) engine for Apache
ModSecurity is an open-source, cross-platform web application firewall (WAF) engine for Apache, IIS and Nginx that is developed by Trustwave's SpiderLabs. It has a robust event-based programming language that provides protection from a range of attacks against web applications and allows for HTTP traffic monitoring, logging and real-time analysis. Libmodsecurity is one component of the ModSecurity v3 project. The library codebase serves as an interface to ModSecurity Connectors taking in web traffic and applying traditional ModSecurity processing. In general, it provides the capability to load/interpret rules written in the ModSecurity SecRules format and apply them to HTTP content provided by your application via Connectors. Before starting the compilation process, make sure that you have all the dependencies in place. -
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WAFW00F
WAFW00F allows one to identify and fingerprint Web App Firewall
The Web Application Firewall Fingerprinting Tool. Sends a normal HTTP request and analyses the response; this identifies a number of WAF solutions. If that is not successful, it sends a number of (potentially malicious) HTTP requests and uses simple logic to deduce which WAF it is. If that is also not successful, it analyses the responses previously returned and uses another simple algorithm to guess if a WAF or security solution is actively responding to our attacks. For further details, check out the source code on our main repository. -
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WAF package for Laravel
Web Application Firewall (WAF) package for Laravel
This package intends to protect your Laravel app from different type of attacks such as XSS, SQLi, RFI, LFI, User Agent, and a lot more. It will also block repeated attacks and send notifications via email and/or slack when an attack is detected. Furthermore, it will log failed logins and block the IP after a number of attempts. Some middleware classes (i.e. Xss) are empty as the Middleware abstract class that they extend does all of the job, dynamically. In short, they all work. -
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WhatWaf?
Detect and bypass web application firewalls and protection systems
WhatWaf is an advanced firewall detection tool who's goal is to give you the idea of "There's a WAF?". WhatWaf works by detecting a firewall on a web application and attempting to detect a bypass (or two) for said firewall, on the specified target. -
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ngx_waf
Handy, High performance, ModSecurity compatible Nginx firewall module
Handy, High-performance Nginx firewall module. Such as black and white list of IPs or IP range, uri black and white list, and request body black list, etc. Directives and rules are easy to write and readable. The IP detection is a constant-time operation. Most of the remaining inspections use caching to improve performance. Compatible with ModSecurity's rules, you can use OWASP ModSecurity Core Rule Set. Supports verifying Google, Bing, Baidu and Yandex crawlers and allowing them automatically to avoid false positives. Supports three kinds of captchas: hCaptcha, reCAPTCHAv2 and reCAPTCHAv3. -
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ModSecurity is a web application firewall that can work either embedded or as a reverse proxy. It provides protection from a range of attacks against web applications and allows for HTTP traffic monitoring, logging and real-time analysis.
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UUSEC WAF
AI and semantic technology Web Application Firewall
UUSEC WAF Web Application Firewall is an industrial grade free, high-performance, and highly scalable web application and API security protection product that supports AI and semantic engines. It is a comprehensive website protection product launched by UUSEC Technology, which first realizes the three-layer defense function of traffic layer, system layer, and runtime layer. -
Go From AI Idea to AI App FastAccess Gemini 3 and 200+ models. Build chatbots, agents, or custom models with built-in monitoring and scaling.
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OctopusWAF
Web application firewall in C language uses libevent
OctopusWAF is a open source Web application firewall, is made in C language uses libevent to make multiple connections. Event-driven architecture is optimized for a large number of parallel connections (keep-alive) which is important for high performance AJAX applications. This tool is very light, you can deploy in any please, this resource turn perfect to protect specific endpoint that need a custom protection. -
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WebPin
Advanced Modern Web Application Manager for Linux
Advanced Modern Web Application Manager for Linux Transform any website into a native desktop application -
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raptor_waf
Raptor - Web application firewall [ Stable version ]
Web application firewall in C using DFA to block attacks. read Docs ! http://funguscodes.blogspot.com.br/2016/08/steps-to-create-your-wafweb-application.html -
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BunkerWeb
Next-generation and open-source Web Application Firewall (WAF).
Being a full-featured web server (based on NGINX under the hood), it will protect your web services to make them "secure by default". BunkerWeb integrates seamlessly into your existing environments (Linux, Docker, Swarm, Kubernetes, …) and is fully configurable (don't panic, there is an awesome web UI if you don't like the CLI) to meet your own use-cases . In other words, cybersecurity is no more a hassle. -
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Coraza
OWASP Coraza WAF is a golang modsecurity compatible firewall library
Coraza is an open-source, enterprise-grade, high-performance Web Application Firewall (WAF) ready to protect your beloved applications. It is written in Go, supports ModSecurity SecLang rulesets and is 100% compatible with the OWASP Core Rule Set. Coraza is a drop-in alternative to replace the soon-to-be abandoned Trustwave ModSecurity Engine and supports industry-standard SecLang rule sets. Coraza runs the OWASP Core Rule Set (CRS) to protect your web applications from a wide range of attacks, including the OWASP Top Ten, with a minimum of false alerts. CRS protects from many common attack categories including: SQL Injection (SQLi), Cross Site Scripting (XSS), PHP & Java Code Injection, HTTPoxy, Shellshock, Scripting/Scanner/Bot Detection & Metadata & Error Leakages. Coraza is a library at its core, with many integrations to deploy on-premise Web Application Firewall instances. -
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Free Web Application Firewall
Free Web Application Firewall
The FreeWAF provides specialized, layered application threat protection. It protects your web-based applications and internet-facing data from attack and data loss. Using advanced techniques to provide bidirectional protection against sophisticated threats like SQL injection and cross-site scripting, it helps you prevent identity theft, financial fraud and corporate espionage. -
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l7f stands for "Layer7Firewall" which is a firewall-system, that protects your application on any protocol and fits its security needs flexibly. It can be used for example as web-application firewall.
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NAXSI module
NGINX compiled with NBS System NAXSI
This image is based on the nginx:mainline image (see on Dockerhub) and recompiled with the same ./configure options from vanilla NGINX sources with the addition of --add-module=naxsi. -
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NinjaFirewall
Powerfull Web Application Firewall for PHP
NinjaFirewall (Pro Edition) is a powerful Web Application Firewall designed to protect all PHP softwares, from custom scripts to popular shopping cart softwares and CMS applications. Some of its features are: * Powerful filtering engine. * Stand alone Web Application Firewall. * Protects against remote & local file inclusions, code execution, uploads, SQL injections, bots and scanners, XSS and many other threats. * Hooks and sanitises all HTTP requests before they reach your website, as well as the response body. * Real-time detection (File Guard). * Response body filter (Web Filter). * Powerful access control and firewall policies. * Easy to setup; your PHP scripts do not require modifications. * Works with any PHP applications, even those encoded with ionCube and ZendGuard. * Management administration console. * One-click updates. * Centralized logging. * And many more... -
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Open Source API Firewall by Wallarm
Fast and light-weight API proxy firewall for request and response
API Firewall is a high-performance proxy with API request and response validation based on OpenAPI/Swagger schema. It is designed to protect REST API endpoints in cloud-native environments. API Firewall provides API hardening with the use of a positive security model allowing calls that match a predefined API specification for requests and responses, while rejecting everything else. -
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OpenWAF
Web security protection system based on openresty
The first all-round open source Web security protection system, more protection than others. OpenWAF is the first fully open source Web application protection system (WAF), based on nginx_lua API analysis of HTTP request information. OpenWAF is composed of two functional engines: behavior analysis engine and rule engine. The rule engine mainly analyzes the individual requests, and the behavior analysis engine is mainly responsible for the tracking of the request information. Rule engine inspired by modsecurity and freewaf(lua-resty-waf), the ModSecurity rules will be implemented using lua. The rule engine can be based on the protocol specification, automatic tools, injection attacks, cross site attacks, information leaks and other security exception request, adding support for dynamic rules, timely repair vulnerabilities. -
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S.I.P.E.R.
Advanced website blocking and productivity tool
A powerful, user-friendly website blocking and productivity application built with modern GTK 4 and Libadwaita. S.I.P.E.R. helps you maintain focus and productivity by blocking distracting websites with advanced features like Pomodoro focus mode, comprehensive statistics, and multi-language support. -
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Serverless Appsync Plugin
Serverless plugin for appsync
Deploy AppSync API's in minutes using this Serverless plugin. This plugin exports some handy variables that you can use in your yml files to reference some values generated by CloudFormation. This plugin adds some useful CLI commands. AppSync is currently using an older version of the Graphql Specs. This plugin intends to use modern schemas for future-proofing. Incompatibilities will either be dropped or attempted to be fixed. Old-style descriptions (using #) are supported by AppSync but will be removed by the stitching procedure which does not support them*. Comments are also not supported on enums by AppSync. -
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Signal Sciences Site Management Tool
Signal Sciences Site Manager
Signal Sciences Site Manager. -
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SuStorID is an advanced Intrusion Detection System (IDS) for web services, based on machine learning. Its name comes from the term “Su Stori”, which in Sardinian language means “The Falcon”. It’s version is experimental, but demonstrates a number of interesting features, that can be readily exploited to detect and act against web attacks. SuStorID can be coupled with modsecurity, the well known web application firewall, to gather training data and provide for real-time counteractions. So, SuStorID is a host-based Intrusion Detection System, and by means of modsecurity can access internal web server’s data (i.e. http request/response fields) exactly as Apache does.
