Open Source ChromeOS Firewall Software

The UPnP PortMapper can be used to easily manage the port mappings/port forwarding of a UPnP enabled internet gateway/router in the local network.

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.

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.

The OWASP ModSecurity Core Rule Set (CRS) is a curated, generic Web Application Firewall rule set that detects and blocks common attack categories across most web apps. It focuses on broad protection—SQL injection, cross-site scripting, local/remote file inclusion, command injection, and protocol violations—without requiring app-specific knowledge. Rules are organized into paranoia levels so operators can tune detection aggressiveness and balance false positives against coverage. An anomaly-scoring model accumulates rule hits per request, enabling nuanced blocking thresholds and easier incident triage. The project ships with extensive documentation, exclusion packages, and testing tools to help tailor deployment for frameworks, CDNs, and APIs. Deployed on engines such as ModSecurity or compatible WAFs, CRS is a widely used baseline for HTTP security in reverse proxies and gateways.

AgentGuard is a real-time protection layer designed to safeguard AI agents and applications from runaway execution, excessive costs, and unsafe behavior during interaction with large language model APIs. It works by intercepting API calls made by an AI system and continuously monitoring usage, including token consumption and associated costs, allowing developers to enforce strict budget limits. When predefined thresholds are reached, the system can automatically halt execution, trigger alerts, or gracefully terminate processes depending on the configured mode. This makes it particularly valuable in environments where agents operate autonomously and may enter unintended loops or inefficient workflows. The tool integrates directly into existing applications with minimal changes, often requiring only a few lines of code to activate protection. It also supports advanced configurations such as distributed tracking through Redis and webhook notifications for real-time monitoring.

BASE is the Basic Analysis and Security Engine. It is based on the code from the Analysis Console for Intrusion Databases (ACID) project. This application provides a web front-end to query and analyze the alerts coming from a SNORT IDS system.

Enables tunneling of network connections through restrictive HTTP proxies. Features: Portmapping, SOCKS4, SOCKS5, web-based admin interface, possibility to use standalone server (perl) or hosted server (PHP), optional authorization from LDAP or MySQL

A java wrapper for popular "libpcap" and "WinPcap" libraries. Accurate full API translation. Packet buffers delivered with no copies. Send custom packets, gather statistics. Comprehensive and easily extensible DPI engine.

SonicReader is used to view and save reports of the internals of a Sonicwall Configuration file. This is useful for those people that wish to know the settings within their saved Sonicwall Configs. I have no affiliation with Dell Sonicwall. Please do not contact Dell Sonicwall regarding the use of this program.

A client for the MikroTik RouterOS API protocol, written in PHP. Easy, tested and documented. All feedback welcomed.

Flexible web-based firewall log analyzer, supporting netfilter and ipfilter, ipfw, ipchains, cisco routers and Windows XP system logs, and mysql or postgresql database logs using the iptables ULOG or NFLOG target of netfilter others mapped to the ulogd format with a view. Fully supports IPv6 for database logs, and netfilter and ipfilter system file logs. Also supports Maxmind's GeoIP version 2 location databases. For Linux, FreeBSD, OpenBSD, Solaris, OSX,etc.

WarpTunnel is a porting of http tunnel 3.3 from C into .NET C# platform. WarpTunnel creates a bidirectional virtual data path tunnelled in HTTP requests through firewall or proxy servers.Support DIGEST proxy & SOCKS4/4a/5.Client for Compact Framework 2.0

VTD-XML is the next generation XML parser/indexer/editor/slicer/assembler/xpath-engine that goes beyond DOM, SAX and PULL in performance, memory usage, and ease of use.

360-FAAR (Firewall Analysis Audit and Repair) is an offline, command line, firewall policy manipulation tool to filter, compare to logs, merge, translate and output firewall commands for new policies, in Checkpoint dbedit, Cisco ASA or ScreenOS commands, and its one file! Read Policy and Logs for: Checkpoint FW1 (in odumper.csv / logexport format), Netscreen ScreenOS (in get config / syslog format), Cisco ASA (show run / syslog format), 360-FAAR compares firewall policies and uses CIDR and text filters to split rulebases / policies into target sections and identify connectivity for further analysis. 360-FAAR supports, policy to log association, object translation, rulebase reordering and simplification, rule moves and duplicate matching automatically. Allowing you to move rules to where you need them. Build new rulebases from scratch with a single 'any' rule and log files, with the 'res' and 'name' options. Switch into DROPS mode to analyse drop log entries.

Forwards non-NTLM HTTP client requests to an NTLM proxy server (ie. Microsoft IAS). Can also forward a local port to a remote machine.

AntiFirewall permits to access any service of any server behind a firewall. It is based on a frontend and a backend.

AMaViS is a script that interfaces a mail transport agent (MTA) with virus scanners.

The program implements the CIDR merging with whitelisting (network exclusion). Output will be summarized to be as small as possible. The program has been widely used for blacklist merge and optimization.

IP Blocker is an incident response tool that automatically updates access control lists on Cisco routers and other devices. Web and command line interfaces are both supported, as is logging, email notification, and automatic expiration of blocks.

Enables access to SSH Shell and File Transfer services using a web browser. Java Servlet application uses pure HTML to provide access to SSH services.

PFL can either operate as a stand-alone firewall log parser or set up to run and configure ipfw. The major focus is parsing, compressing, and filtering *NIX (to include Mac OSX) firewall logs generated by IPFW for quick and easy admin review.

JWall is not just a java gui for iptables. JWall is a multi firewall management client. A secure rulebase can be built with graphical objects. Rulesets can be pushed to remote firewalls (via ssh). The remote firewall just needs to be Linux with sshd

Defa Protector is A Simple PHP and Wordpress Plugin To Protect and Prevent Video Save As From Browser and Some Video Grabber. There is 100% Guaranteed Protection and There might be some tradeoff but If you care about Digital Rights Management of Your Video and Music Content. This Project is for you. Defa Protector 6.7.1 Revamp Code For Better Performance To The Bone. We almost rewritten this project from scratch.

Web interface written in php for ISC bind and ISC dhcp configuration and administration. It keeps it's own database containing general dns and dhcp information and information about subnets, hosts etc. Configures DNS, DHCP, firewalls, RADIUS servers..

The Firewall Tester is a tool designed for testing firewalls' filtering policies. It includes an Intrusion Detection System testing feature, along with a packet generator tool and a sniffer. Unlike common firewall testing tools or packet generators, fte