firewall_e is a small Web application which allows administrators to create lists of servers, users, and ports and assign them to each other. This allows an administrator to login, create users, and assign ports on servers for them to access. Users can login and their remote IP address will be stored. From this address, they'll then be able to access whatever services the administrator provided them.
IPTEditor intends to ease the task of managing/editing iptables rules. It presents an intuitive graphical interface that organizes iptables tables as tabs of a notebook, each of which, in turn, organizes their chains in notebooks tabs. Each rules tab contains a list made up of rows (rules) or item columns ordered according to their occurrence. The items in the rows can be edited by appropriate forms, such as through dialogs for targets and criteria (modules), edit fields for network addresses, and selection boxes for actions and protocols, among others.
flex-fw is a small and fast front-end for the Linux iptables utility with an easy command syntax like ipfw or pf from BSD systems. It features service-oriented configuration, support for network profiles, which is useful for notebooks, support for macros, easy migration to another network environment by redefining macros, easy distribution to many hosts, syslog logging support for iptables errors and dropped packets, an interactive mode for manually configuring "on the fly", a batch mode for execution from shell scripts, and a library mode for using the flex-fw functions in your shell scripts.
Kattive is a captive portal with an interesting interface, written in Perl and completely Web-based. It interacts with iptables or whatever you want. It's template-based. It works as a transparent rule activator and as an Internet Point interface. It has many features like schools/classes administration. If used in a hotel, you can count the time for billing.
LILA is a command line tool that allows you to monitor netfilter logs stored in a MySQL database in real time. It converts the text messages created by netfilter into nice colored output. Two features that should be highlighted are that it resolves IP addresses to hostnames with two different techniques and detects duplicate packets (with the same destination IP and chain) that have been sent in a freely configurable time interval. This allow the user to avoid getting flooded with hundreds of identical packets that don't offer any additional information. It uses a separate configuration file, which allows you to modify various aspects on how it works and how logs are being displayed. It has a lot of other features.