At some point you may be interested in building a firewall for your dedicated server that you lease from a hosting company. Once you do that you will be faced with trying to work with the assigned IP Addresses to the server. Typically hosting companies will assign a subnet and use aliases for the one Ethernet card that is used on the server.

Vuurmuur is graphical front end for famous firewall software iptables. You can make complex firewall rules in simple steps. Vuurmuur supports traffic shaping, has powerful monitoring features, which allow the administrator to look at the logs, connections and bandwidth usage in realtime.

"If, like many people, you've started to experiment with enabling, configuring, and using, IPv6 it might not have crossed your mind to update your firewall. This could lead to surprises if you're unlucky. Read on for a simple overview. The standard userspace firewall tool upon Debian GNU/Linux is iptables.

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.