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.
natportmapper provides a web UI to help system administrators to map NAT network internal and external ports easily. You can easily manage your NAT network without knowledge on network.
Valkyrja (Php Firewall front-end) is a web-based tool to administrate a linux firewall based on iptables. Valkyrja is modular, everyone can write a component for it. As Soon as possible: squid manage, NAT manage
Dick's SpeedTouch-O-Matic - (check the new website) a PHP webinterface to configure NAT settings (portmapping) on (Alcatel/Thomson) Speedtouch modems. You can even manage your NAT settings remotely, and open complete port ranges easily.
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RouteIt can help you setup your firewall by generating iptables rules, it can setup Network Address Translation (NAT) and bridge rules in iptables, it can also help you set traffic limitations and more, from a simple web interface.
skyPipes Advanced Router is a GNU/Linux/Apache/SSL/PHP/PostgreSQL web app that manages a combination of NAT, Static Alternative Routes, and Dead Gateway Detection rules to balance LAN/DMZ traffic across multiple ISP connections with redundant failover.
Traffic Control is a Linux toolbox to control squid, NAT, and other
services traffic limits. TF uses Linux iptables to count traffic.
This utility consists of two parts. The first is server side
(written in Perl) and the second part is the interface.
SerialTracker is a tool for keeping track of machines in terms of serial numbers, asset values, historical tracking of issues, software and other notes. It also tracks IP addresses, aliases, NAT address, hardware configuration and provides themes.