Unlike all other solutions, LanShield WebContent Control checks the content of a website on a context-sensitive basis. This new innovative function examines the content (including hidden content) for textual association and relationships, guaranteeing maximum accuracy. Current studies show that other content security solutions have an error quota that exceeds 80 percent. Such a high margin for error means that these content security solutions do not improve security significantly and thus do not reduce costs. Hence the cost-performance ratio is not achieved.

The explosive growth of the Internet
As the Internet grows, the number of Internet URLs steadily increases. In Germany alone there are currently 4 million Internet URLs registered, and up to 9,000 are added every day. According to statistics from the INTERNET SOFTWARE CONSORTIUM, this adds up to about 100 million Internet addresses worldwide, which in turn contain an even larger amount of Internet pages. If an administrator collected all available lists, he or she would be able to block a total of only 3 percent of all Internet pages. Lists can be permanently updated, however this would also require more frequent checks. Each update can amount to several Megabytes.

Does the Vatican operate a pornographic Web site?
Filter lists are generated using crawler-like search engines that search the Internet for objectionable content every day. Crawlers operate much like conventional search engines. It is not surprising that filter lists and crawlers produce a wide range of results that include much material unrelated to the original search terms.

Manual verification of filter lists is time consuming and impractical. Unfortunately, some URLs that should not be blocked get added to the lists. How else could one explain the fact that the web site of the Vatican ended up being blocked? An article on abortion contained keywords on the filter lists; hence, filter engines blocked the entire site. An American organization called Peacefire offers detailed information on the advantages and disadvantages of filter lists, and even points to a program that allows bypassing of most filter engines.

Content of databases remains hidden.
Critical content is immediately detected by crawlers and detection occurs automatically when linked to the Internet. Crawlers are able to continue hacking until they hit a “dead end” (dead link) or a link that refers to the content of a database. Most dynamically generated web sites remain hidden from crawlers. Hiding websites is similar to hiding a magazine archive in an area inaccessible to library patrons. Conventional filter engines often react to hidden pages by completely blocking all web pages located behind the main URL. The disadvantage of this type of filter engine is that other web pages that contain good material are also blocked.

The firewall is at fault
Filter-based lists are often used in addition to firewalls, and they have very similar error margins. As most firewalls identify communication partners by IP addresses, Internet addresses are automatically converted into IP addresses (www.webdefender.de = 2xx.xxx.xxx.xxx). Most IP address can serve up to 1,000 web sites with a wide variety of content. A single Internet page with pornographic content could cause all other web sites to be unjustly placed on the filter index and blocked. The best known example is the web site of the well known German magazine “Stern”. Erotic content on one web page caused the entire “Stern” web site to be blocked.

LanShield® WebContent Control used in addition to a hardware-based filter technology, solves all known filter problems, making it a market leader in this type of cutting-edge technology.






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