Israeli security firm Yoggie has released its Linux-based USB Stick Firewall Gatekeeper product in an Open Source version. The open firewall products also include a developer kit.

If you don't have time to tinker with complicated firewall rules, you might want to check out the clever FireHOL approach.

Are your systems secure against DNS attacks? We'll show you why they matter and help you determine whether you are vulnerable.

This Linux computer on a USB stick acts as a tiny mobile firewall.

Instead of granting access by address, the NuFW Netfilter module provides identity-based authentication. The Edenwall firewall appliance comes with built-in NuFW technology.

Internet intruders have many ingenious ways of escalating privileges and hiding their presence once they get inside your system. The best protection is to keep them out in the cold.

A full-fledged Linux computer on a USB stick: Yoggie uses this astonishing hardware trick to protect Windows machines against Web-based attacks. But there are some things that do not work as intended by the developers as an exhaustive test in Linux Magazine #94 / September will reveal. Just a few simple tricks were all it took to work around the firewall.