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.

CacheGuard Gateway is a free and open-source Unified Threat Management (UTM) solution, a Web Application Firewall (WAF), and a Quality of Service (QoS) platform designed to optimize WAN traffic. To obtain a CacheGuard Gateway appliance, download CacheGuard-OS and install it on the bare-metal or virtual machine of your choice. It’s that simple and completely free. The UTM includes a firewall, web antivirus, VPN server, and a URL-filtering and SSL-inspection web proxy. The WAF operates in conjunction with a reverse proxy, web application load balancer, and SSL offloader, and is capable of blocking malicious requests as well as traffic from IP addresses with poor reputations. The QoS manager enables traffic shaping to prioritize critical network flows, load balance multiple WAN links, and cache web traffic.

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

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.

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.

FireHOL is a language (and a program to run it) that builds secure, stateful firewalls from easy-to-understand, human-readable configurations. The configurations stay readable even for very complex setups. FireQOS is a program that sets up traffic shaping from an easy-to-understand and flexible configuration file. Both programs abstract away the differences between IPv4 and IPv6. so you can concentrate on the rules you want. You can apply rules for IPv4 or IPv6, or both, as you need.

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.

HardWall Firewall: Is an iptables script that does the following:- Port Forwarding, Packet Filtering, Statefull Packet Inspection, Port Redirection, Masqurade, SNAT, DNAT, NAT & Bridging - Functions as both a Workstation and IP Forwarding Firewall

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,...)

The PCX Firewall is a perl script that generates a customized shell script to start, stop and restart the IPTables based firewall. You can build a MULTI-homed system or a Standalone system. DNAT, SNAT, Redirection, Blocking, etc. are all supported.

Alfandega is a strong and Modular IpTables Firewall. It provides NAT, port-forwarding, spoofing list, blacklist of crackers and spywares sites, protection for tcp/udp scans, DOS/DDOS and Smurf attacks, TCP tuning, DHCP and PPP support and much more.

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.

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

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.

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

Bootable CD Forensics/Virus Scanning/Recovery/PenTesting platform

Live Security/Forensics Linux Distribution, built from scratch and packed full of tools useful for vulnerability analysis, penetration tests, and forensic analysis.

This project has been modified amd now is ISP Manager . This is working on linux , and make the life of isp administrator easy like never cod be .

TuxFrw is a set of scripts created to ease the way Linux IPTables rules are configured. Using TuxFrw an user can configure his own Linux / Netfilter based network firewall, simply passing some IP address numbers and other services utilization policie

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.

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/

Easily turn a Ubuntu-based computer into a full linux router, complete with dhcpd, named/bind, iptables firewall, and packet inspection of the network traffic being routed. Deep packet inspection for layer 2 (mac), layer 3 (ipv4, ipv6), layer 4 (icmp, tcp, udp), and layer 7 (application-specific). Summary of network flows and all layers of inspected traffic is stored in a database at 1-second intervals. This database is then mined to drive the Apache/PHP web interface.

SSPE: Simple Security Policy Editor is a simple distributed firewall with an central ascii administration. It uses two plain manually edited ascii-files and some other, static files for each of the target-machines to generate iptables.

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.