Sophos has released a Web filtering appliance for business users, one of several vendors adding the technology to\u00a0its security product lineup.The WS1000 appliance, which sits at the gateway, is designed to stop users from infecting their computers with harmful programs as a result of Web surfing, said Graham Cluley, senior technology consultant for Sophos, on Tuesday.Web filtering software and appliances are a growing area for security vendors, as they offer the advantage of stopping malicious code and executables before they reach the desktop. They aren\u2019t a replacement for desktop antivirus software, however, as users can still infect their machines by clicking on, for example, a link in an instant message or an e-mail.The WS1000 has several features to control Web traffic. It can block websites that administrators don\u2019t want users to view, and it also scans websites for malicious code as users visit webpages. The appliance checks against a database of websites to see if a site has been flagged for malicious activity. The company scans the Web for sites that look suspicious, and they are added to the database every five minutes, Cluley said.Sophos has also struck a partnership with SurfControl PLC, a security vendor that produces a database of bad websites. SurfControl\u2019s database will soon be integrated into the WS1000, Cluley said.The appliance also includes Sophos\u2019 behavioral genotype technology, which can block a file if it shares characteristics with similar malware, even if a sample of the malware has not been seen before.Sophos hopes the appliance will push its other products into companies that aren\u2019t using its antivirus software, Cluley said. The WS1000 can alert an administrator if a desktop tries to access a banned URL, highlighting the failure of the desktop antivirus software.The WS1000 is aimed at organizations with 100 to 1,000 users, although more appliances can be used for bigger companies.The appliance is available now, priced in the United Kingdom\u00a0at 2,750 pounds\u00a0(US$5,314) for the hardware, plus 3,540 pounds\u00a0per year for 500 users.\u2014Jeremy Kirk, IDG News Service (London Bureau) \n\n\n\nCheck out our CIO News Alerts and Tech Informer pages for more updated news coverage.