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-Based Protection"> More On Network-Based Protection On my own network I use Ositis Softwares Winproxy 5. Its the only affordable product I know of that provides both network-based firewall and network-based antivirus. The annual antivirus definition subscriptions are also very reasonably pricedabout $10 per client per year, depending on how many you buy. Im not entirely happy with Winproxy, and perhaps its biggest weakness is that they do not support VPN connections from the Internet into the local network. Plus, it requires a computer to run on, and appliances are so much simpler and cheaper.In all honesty, I cant say the same about firewalls. If you have a network-based firewall, theres a good argument to have client-side firewalls, too, but its a harder case to make. The scenario that youd want to watch for would be if some sort of Trojan Horse snuck through the antivirus protection and ran on one of the clients, attacking other clients inside the network. If it communicated outside to the Internet it would have to get past the network firewall. Most of these products are not designed for consumers, so you may need more expertise than you expected. In fact, especially for a business, you should probably get a consultant to help. If somethings worth doing, its worth doing right. Security Supersite Editor Larry Seltzer has worked in and written about the computer industry since 1983.
Its tempting, once you have network-based protection, to think that client-based protection is a waste. In one sense, it really is a "belt-and-suspenders" thing, but I know from personal experience that its worthwhile. Over the years Ive had relatively few virues get through the Trend antivirus scanner in my Winproxy box, but a few have, and they have all been blocked by the Norton antivirus at my clients. Theres no doubt in my mind that its a very good idea to have network-based antivirus, and its essential to have client-based antivirus. And if you follow this strategy, make sure to get the two products from different vendors.