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Another policy enforcement product, but with some added features that really give it some teeth, is iomart's NetIntelligence. As well as monitoring URL requests, it also looks at the network as a whole (hardware, software and all files) and can instantly detect whether any unauthorized changes have been made, or whether any prohibited content is suddenly present.

N2H2 is generally considered to be one of the best content/URL filtering products on the market, and looking at in this group test, it is easy to see why.

I suppose this review may be thought of as two. The SecuGen EyeD Hamster fingerprint biometric reader and the SecuIBAS 'internet' authentication suite software.

Windows Vista will not be affected by the swathe of viruses created for it, claims Microsoft. Months before the long-awaited new operating system has hit the shelves, an Austrian virus writer has published details on five viruses targeting Windows Vista in an underground magazine.

ActivCard AAA Server has been designed for industrial or large-scale implementation. Its separate administrative console allows for delegation of multiple administrator roles if the situation calls for it. Installation of the software only requires a system large enough to hold Windows Server 2003 running as a Domain Controller.

Administrators often forget that management of emails isn't simply a question of who can send or receive them, or the content. When email arrives it sits in the inbox, but who has permission to access that inbox, or other folders for that matter?

With high turnovers of employees becoming increasingly common, the stressed administrator may well lose track of individual permissions. For example, many companies usually have a set of freelance or contract email ­ accounts that can be assigned to temporary staff. The permissions required by one contractor may be far more extensive than those required by their successor, but they could very well inherit those permissions when they arrive. And human nature being what it is, inquiring minds will almost certainly take advantage of this, whether innocently or maliciously.

Hardware located in the main office on your LAN can allow remote workers punctual and user-specific access to work areas that need to remain secure during any remote communication periods. The ability to use this type of access improves productivity and ensures that employees are able to work remotely without compromising your network security.

New Zealand-based Marshal Software, now part of NetIQ, might not be so well known as some vendors in this Group Test, but it has produced an impressive product in its MailMarshal application, a fully-fledged email security solution.

MailMarshal is suitable for any type of organization. For small businesses, it can be used to replace the existing mail server and act as a POP3 server for up to 500 users. Larger organizations can co-locate the product on their SMTP server (although this is another spool-and-forward application, so performance is an issue), or install it on a dedicated machine.

One of the major headaches for network administrators is bandwidth consumption. However big your pipe into the internet happens to be, it's the last few feet from the server to the desktop that is the killer. A few years ago, people took their eye off the ball where bandwidth is concerned, as it was assumed that everyone would be migrating to the fatter cables of category 6. However, standards issues and an unwillingness to spend money in today's uncertain times means bandwidth is still at a premium. Files have not stopped growing, with multimedia data bringing many networks grinding to a halt.

Matters would be considerably worse if it weren't for the godsend that is PKZIP. Files are compressed by as much as 90 percent, allowing hefty files to shrink to more manageable and less bandwidth-hungry sizes. Probably the most ubiquitous non-Microsoft application around, PKWARE's PKZIP is probably the best compression program available - well, they did invent the Zip format.

CyberGuard offers a range of firewall/VPN appliances with specifications ranging from three Ethernet interfaces and 125Mbits/ sec throughput to 21 Ethernet interfaces and 2Gbits/sec throughput. All have an integrated VPN, run the same firewall software, and have the same configuration GUI. We tested model KS1500, which can have up to 18 Ethernet interfaces, of which two are gigabit-over-copper as standard.
Performance is the strength of the KS1500, which is designed to cope with 1.5 Gbits/sec throughput and up to 1.2 million simultaneous connections. The firewall boasts a host of certification standards including Common Criteria Eval­ uation Assurance Level 4+ (EAL4+), ICSA, ITSEC E3, Checkmark, etc. The secure operating system was designed to meet TCSEC/NCSC criteria at the 'Orange-book' B2 level.

ViraLock takes a different approach to securing a users' email system from the ravages of viruses and other malware. Rather than prevent a virus infection, the software is designed to work with existing anti-virus applications and firewall systems to prevent a users' mailbox from being compromised by an executable of any type.

Access control comes in many flavors, depending on what you want or don't want users to have access to. Now it's the turn of other documents to get some added protection with Adhaero's business document security solution. This protection extends beyond the network, and documents under its aegis can only be read by authorized eyes. It allows Word, Excel, PowerPoint and Outlook objects to be encrypted, and then assigns digital rights that dictate what can be done to them.

Computer Associates has acquired Tiny Software, a developer of firewalls and other endpoint security for Windows desktops and servers. Microsoft plans next week to release 10 security bulletins, including some rated as critical for Windows. In an interview last month for the BBC, Bill Gates once again stressed how seriously Microsoft is now taking security. He spoke proudly, for example, of the 100 million downloads of Service Pack 2 for Windows XP. "Users don't achieve full potential," he said, "if they're having to worry about something like security."

This product is available as Windows software, which we reviewed, or a dedicated Linux appliance. A combination of email content filtering and anti-spam technology, Message Inspector offers a comprehensive company-wide email security solution.

ModusGate is a comprehensive email security package that requires Windows 2000 or 2003 as well as IIS, ASP.net, as well as the .NET framework installed on the destination machine.

Cloudmark's Immunity is another gateway product, sitting between your email server and the outside world. As such, you can install it on Linux or Windows Server (2000 & 2003). We tested the Linux version of the software, using Sendmail as the mail server.

The Passlogix single sign-on product is particularly versatile and caters for a broad range of potential applications. You can use it in a simple set-up for accessing your Windows and web applications, or, if you really want to put it to work, you can configure it for a variety of client/server, mainframe, database and even dial-up networking and VPN applications.