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Firewall

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Set up Your Firewall With Firewall Builder

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Firewall Builder (fwbuilder) is a graphical application that can help you to configure IP traffic filtering. It can compile the filtering policy you define into many specifications, including iptables and various languages used by Cisco and Linksys routers. Separating the actual policy you define and the implementation in this way should let you change what hardware is running your firewall without having to redefine your policy for that platform. How do you setup your firewall? Do you use an application to help or do you us just write your own Iptables? This article looks at a firewall application called fwbuilder and shows you some of the features of this software.

Gibraltar Firewall 2.6 Launched

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Gibraltar Firewall 2.6, a Linux firewall distribution based on Debian, was launched yesterday as announced by Rene Mayrhofer. This will be the last release that will use the Linux kernel 2.4, as the next Gibraltar editions will use the 2.6 kernel. Among other things, this edition of Gibraltar offers improved traffic shaping performance (the iptables marking rules were re-ordered and the pre-defined traffic classes were improved), and allows SSL Explorer plugins to be installed. Have you ever used the Gibraltar Firewall? Gibraltar provides the user with a web interface for setting up their firewall. Now it's available for the Linux 2.6 kernel. Also in this release they added full WLAN access point functionality.

How To Set Up Shorewall (Shoreline) 4.0 Firewall On CentOS 5.1

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The Shoreline Firewall, more commonly known as "Shorewall", is a high-level tool for configuring Netfilter. You describe your firewall/gateway requirements using entries in a set of configuration files. Shorewall reads those configuration files and with the help of the iptables utility, Shorewall configures Netfilter to match your requirements. Shorewall can be used on a dedicated firewall system, a multi-function gateway/router/server or on a standalone GNU/Linux system. Shorewall does not use Netfilter's ipchains compatibility mode and can thus take advantage of Netfilter's connection state tracking capabilities. https://www.shorewall.net/ Shorewall is a great firewall package for Linux it's, most distro's have packages available. What do you think about Shorewall? Do you have any other favorite firewall package.

A Dedicated Firewall/Router: Devil-Linux

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Devil-Linux is a distribution which boots and runs completely from CD. The configuration can be saved to a floppy diskette or a USB pen drive. It was originally intended to be a dedicated firewall/router but now Devil-Linux can also be used as a server for many applications. Attaching an optional hard drive is easy, and many network services are included in the distribution. Have you used any Linux distributions which are design to be used as a firewall or router? This article looks at the Devil-Linux distribution with some useful links to learn more about this Linux distro.

Linux Demilitarized Zone (DMZ) Ethernet Interface Requirements and Configuration

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(The)Demilitarized zone, used to secure an internal network from external access. You can use Linux firewall to create DMZ easily. There are many different ways to design a network with a DMZ. The basic method is to use a single Linux firewall with 3 Ethernet cards. The following simple example discusses DMZ setup and forwarding public traffic to internal servers. There's a little advanced know-how required here and he recommends a couple good firewalls to set up such functionality just in case this very useful guide doesn't fit the bill. If you are looking to set up a Linux Demilitarized zone a couple of options include EnGarde, IpCop and others.

Iptables as a Replacement for Commercial Enterprise Firewalls

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Are you administrating a corporate network? How do you ensure securing your web services? There are many different solutions, but Iptables is one of the newer ones, and is up to the job. With IT budgets getting tighter, managers need to trim costs. Service contracts are expensive for any technology; firewalls are no exception. Netfilter, the project that provides the packet filtering program Iptables, is a free firewall alternative. While it lacks the service contract of commercial solutions and a pretty interfaces to make firewall modification easy, it has solid performance, performs effectively at firewalling, and allows for add-on functionality to enhance its reporting and response functions.

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