Christopher Moody

Fortinet's FortiGate 5020 is built using a powerful chassis containing dual, hot-swappable power supplies as standard, building in redundancy. The chassis can also house two 5001 blades, each of which comes with four copper Gigabit Ethernet ports and four small, form-factor pluggable (SFP) ports.

Symantec's Gateway Security 5440 fits in the middle of its 5400 series range. It comes with six Gigabit Ethernet interfaces, although you can also buy the 5441, with four fiber and two copper interfaces instead.

Microsoft's Internet Security & Acceleration (ISA) Server 2004, is the company's application for turning a Windows 2000 or 2003 server into an enterprise firewall. Installation was painless on our test Windows 2003 server.

The Nokia-Check Point partnership has been a successful one, combining Nokia's excellent hardware implementation with Check Point's proven security technology, as we can see with the IP380. Aimed at the small enterprise or branch office, the IP380 comes with a cryptographic accelerator, capable of 130Mbps of 3DES VPN traffic and four Fast Ethernet ports. With two spare slots in the 1U chassis, you can upgrade network capability at a later date.

Nortel's whole approach to security is different to the other manufacturers on test, as this bundle incorporates two products: the 6600 Accelerator and the Director 5024 firewall.

Better known for its smaller appliances, SonicWall has pushed into the enterprise market with its Pro 5060f. Running SonicOS Enhanced 3.1, the 1U appliance houses a 2.4GHz Intel Xeon processor, 512MB of RAM and six Gigabit Ethernet interfaces. The 'f' in our model signifies that two of these ports are multimode fiber, but you can buy a 5060 with six copper ports.

CyberGuard's TSP3600 is a beast of a firewall. A case 5U high houses a RAID array for data protection, 13 Gigabit Ethernet ports and one Fast Ethernet (up to a maximum of 30 ports) – more than enough ports to cope with very large networks.

Astaro's Security Linux 5.1 takes the open source Linux software and hardens it, but also adds commercial software for a complete security package. It comes with six components: firewall, VPN, anti-virus (provided by Kaspersky), content filtering, anti-spam and intrusion prevention.

Protecting a single PC from harm usually involves installing a software firewall. However, on a server the overhead this causes can be too much, hence Innominate's mGuard PCI firewall, which has its own 266MHz processor and 32MB of RAM. We tested the professional version. There is also an enterprise version with higher specifications and a greatly improved management interface.

While most firewall appliances will run a custom operating system, or secured version of Linux, Celestix has decided to use Microsoft's Internet Security and Acceleration (ISA) 2004 Server as the basis for its MSA4000 appliance. It runs Windows Server 2003 using 1GB of RAM and an 80GB hard disk. This, obviously, adds to the price of the appliance.

Think of firewalls and Check Point is inevitably the first name that springs to mind, probably followed by thoughts of huge expense. This is not the case with Check Point Express, which brings high-end firewall technology to mid-sized businesses.

SmoothWall's Corporate Guardian 3 is one of the best value firewalls on the market. Just provide your own base PC, and the installation will take care of everything else.

For the price, D-Link squeezes a lot of features into its Linux-based DFL-1100 appliance, including a SafeNet PCI VPN accelerator card and four Fast Ethernet ports.

Servers are often entry points to a network, particularly those that are internet visible. Kerio's ServerFirewall, designed for Microsoft operating systems, is designed to combat that by filtering traffic at the server.

Kerio's stateful inspection WinRoute Firewall 6 operates on Windows 2000/XP/2003. After a painless and quick installation and reboot, it is ready to run.

With individual PCs being a high risk factor in a network, a personal firewall is an important consideration, particularly when you have notebooks going in and out of the company. CrossTec's NetOp Desktop Firewall is one choice.

Symantec's Enterprise Firewall works with Windows 2000/2003 or Solaris 8/9. We installed it on our Windows Server 2003 machine with two network interfaces (a requirement of the software).

WatchGuard's Firebox X range of appliances is designed to cope with the needs of enterprises of all sizes.

Network Engines, along with Celestix and its MSA4000, is the second company in this test to use Microsoft's Internet Security & Acceleration Server in an appliance (see Celestix review for more information).

BorderWare's SteelGate SG-200 runs the company's own firewall, Firewall Server 7.1, running on the S-Core secure operating system. Rather than building an appliance from the ground up, the SG-200 is simply a PC (2GHz Intel Celeron Processor, 512MB RAM and a 40GB hard disk) in a rack-mountable chassis.