The Implementation and Evaluation of the Proxy Server`s Access Control

Abstract

The Internet has become the largest worldwide source of information, containing information on virtually everything and anything imaginable. Yet having such a volume of information available with such ease of access raises the problem of suitability. No one will ban their children or students from accessing information via the Internet. Neither will they wish a 10-year-old child to access pornography or violent imagery.\nWith the rapidly growth of WWW server, the web browser becomes the popular information retrieval tool, which pulls the need of proxy server to reduce replicated transmission of data around the long distance or national communication link. We focus on the performance impact of access control scheme of the proxy server. There are many public domain softwares exist to do with the information filtering. As the Block-list grows huge, it seriously impacts the response time and performance of the proxy server.\nIn this paper we will study the available public domain software. As far as performance concerned, we choose the Squirm and SquidGuard, which are implemented in C programming language. We modified the source code and do the experiments with standalone testing of each program. The result is dramatically different as mentioned in section five. It turns out that the response time of SquidGuard nearly remains constant while increasing the number of URL block-list. Finally, there are works can be continued. That is the construction of block-list database and the maintenance interface program.