Open Source Unix Shell Firewall Software

Smoothwall is a best-of-breed Internet firewall/router, designed to run on commodity hardware and to provide an easy-to-use administration interface to those using it. Built using open source and Free software, it's distributed under the GNU Public License.

The IPCop Firewall is a Linux firewall distribution. It is geared towards home and SOHO users. The IPCop web-interface is very user-friendly and makes usage easy.

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.

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/

Those who have read past the "Malware" warning can be assured there is absolutely no malware in this OS or in the download. This warning comes from the "netcat" binary included in the download as a DOS time client. Unfortunately netcat has code that is flagged as malware. FREESCO, a NAT/firewall router/server based on Linux and runs on a single 1.44MB floppy. Freesco is very powerful and versatile and can connect multiple home or small office networks to most types of Internet connections including dialup.

BrazilFW is a mini Linux distribution designed to be used as a Firewall and Router that runs easily on older computers. An old PC running BrazilFW is much more powerful and efficient than commercial software for routing in offices and residences running on a "powerful" computer. BrazilFW is based on Coyote Linux, which was designed by Joshua Jackson who discontinued Coyote Linux in version 2.24 in August 2005. In that same month comes on the scene BrazilFW Firewall and Router (BFW) with version 2.24, which is led by "Claudio" and "Marcelo - Brazil", running only on floppy disks, and being 2.30.1 the last version with this support . The following versions, as well having automatic detection of network cards, only run on large capacity media, such as hard disk (HD). Versions in Development: * 2.33.x: Uses kernel 2.4.x and is developed by Marcinho Samurai. * 3.x: Uses kernel 4.x and is developed by WoshMan

MailCleaner Open Source Edition is now discontinued but will continue under the spamtagger project https://github.com/SpamTagger [antispam] MailCleaner is an anti-spam / anti-virus filter SMTP gateway with user and admin web interfaces, quarantine, multi-domains, multi-templates, multi-languages. Using Bayes, RBLs, Spamassassin, MailScanner, ClamAV. Based on Debian. Enterprise ready. MailCleaner is an anti spam gateway installed between your mail infrastructure and the Internet. It includes a complete GNU/Linux OS and a graphical web interface for user and administrative access. It comes in the form of virtual machine templates.. - fully compatible with any SMTP mail server (Exchange, Zimbra, O365,...)

OpenVoucher is an open source voucher management / hotspot system for authenticating guests in your wifi or cable network. It is designed to be easy to use for anyone who wants to issue vouchers. For further information and installation how to's, see the project's homepage. The source code is maintained on Github.

An iptables based firewall for systems running the Linux 2.4 or later kernel. Very flexible configuration allows the firewall to be used in a wide variety of firewall/gateway/router and VPN environments.

bastion-firewall is a Netfilter based firewall for Linux. It can generate graphical stats of all the rules traffic in the firewall with Rrdtool and it's integrated with the Snort Inline IPS. It's written in the bash and C programming languages.

Snort2Pf is a small Perl daemon which greps Snort's alertfile and blocks the "naughty" hosts for a given amount of time using pfctl.

This project will serve as a central hosting/bug tracking center for modifications to the SmoothWall.org firewall distribution. Support and information for the "mods" posted here can be found on the SmoothWall.org forums, the SmoothWall.org IRC server, or

Bypass is an IP forwarding/tunneling tool which can be used where limited bypassing of a firewall is necessary, but relaxing the restrictions in the actual firewall is not an option. The aim is for bypass to be automatic and transparent.

Bootable CD Forensics/Virus Scanning/Recovery/PenTesting platform

The p2p_grab script will make a log which is useful to generate an IP list. This list is inserted in cbq to shape the bandwidth for the users that use P2P programs. Also the IP list can be inserted in an iptables firewall script...

Easily share a VPN connection with your virtual machines or containers with this script. Works with IPsec VPN connections (like strongSwan), and lets your VMs reuse the VPN connection of your host system. Create a desktop launcher to start the VPN connection sharing script whenever you need it.

arlinux is a mini-linux (floppy) distro for Recovery o Router/Firewall purpose. Realname is Advanced (Router/Recovery) Linux

The fwiptables is a one-file WIZARD, for IPTABLES with COMMAND-LINE, with CLI-MENU, with GUI-MENU, with GUI-ROLL, with GUI-SHELL. fwiptables develop with Purpose Educational Since 2020, developing code Since 2024, cleaning code Since 2025, fixing code Browse Wiki: https://sourceforge.net/p/f-iptables/wiki/browse_pages/ Anonymouse Ticket: https://sourceforge.net/p/f-iptables/tickets/

NOTICE: The format of this project has been changed from ISO to using ansible and has been moved to GitHub. Github link: https://github.com/Bifrozt/bifrozt-ansible

Easiest way to turn a Linux System into a Nat router with a web interface for firewall configuration and monitoring. For beginers, offers a simple and secure solution. For advanced users, a customizable and friendly way of remote administration.

A light script to make a black-list system troug iptables. You can create the black-list and manage it troug this program. Please read README file to know better this script.

9Muri is an higly configurable firewall script developed on Red Hat Fedora Core 4 and 6. It's developed in Perl and Shell script.

The ADSL optimizer is an accurate packet scheduling solution for ADSL connections, based on Linux and HTB. The solution guarantees low latency while maintaining full utilization of both upstream and downstream, without wasting link capacity.

ADSL4Linux is a program to connect your Linux box via ADSL to the internet in as few steps as possible. This is all done in the easiest possible way. Also contains two Firewalls (ipchains and iptables).

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