TAILIEUCHUNG - Content Filtering

Content Filtering Many enterprises are beginning to concern themselves with the use of the corporate Internet connection by their employees. | Content Filtering Many enterprises are beginning to concern themselves with the use of the corporate Internet connection by their employees. The unmanaged access to inappropriate or distracting web content can involve significant legal risk and may well jeopardize network security. Additionally unmanaged access to web content typically results in significant reduction of employee productivity. These issues cannot be easily ignored by many companies. One of the newer features being required of firewalls is the capability of filtering the content that passes through them. This filtering typically is defined as URL filtering whereby the firewall is used either by itself or in conjunction with another appliance or software suite to control which websites users are allowed to visit. However given that web content can range from the simple to the complex firewalls typically offload the detailed evaluation and decision making to other devices which is an excellent example of the limitations of a firewall being a selfcontained contentfiltering device. Rather the firewall becomes a control point where the decision made by the evaluation device whether it is a content engine or a filtering software suite is applied to user traffic. Implementing a URL Filter Implementing URL filters is relatively straightforward. There are two typical ways to implement a URL filter. The first is to maintain a list of URLs that will be blocked on the firewall typically in the format of an access control list ACL . This can be a timeconsuming process for both the implementation and maintenance of the URL list. Additionally because ACLs are typically stored in a flat file format the firewall can be subjected to latency in permitting or denying traffic while a large ACL is being processed. The second method is to utilize a thirdparty contentfiltering application running on a separate server from the firewall or on a content engine that is separate from the firewall to handle the actual building .

• An ninh - Bảo mật
• công nghệ thông tin
• an ninh
• bảo mật
• fire wall
• tường lửa
• Fire wall fundamentals
• Content Filtering
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