結合網域名稱與網路代理伺器進行資訊管制與分流之架構及其實作

Abstract

隨著WWW 的普及，資訊的散佈非常迅速，對知識的累積有很正面的幫助，然而Web 上的各種資訊也衍生出負面的問題，就是越來越多不當資訊充斥其間，例如色情圖片與粗暴文字。本論文主要分析如何對以網站阻擋為主的不當資訊防治，同時根據TANet 現狀，提出多種以網路代理伺服器利用網域名稱系統進行色情資訊過濾的策略。這些方式對於代理伺服器不會造成額外負擔，而佈置成本與效率上只需要一台專用的網域名稱伺服器，有集中管理、維護容易、使用單位容易加入之優點。為驗證策略的可行性我們實作系統雛型，並安裝於桃園區域網路中心，實驗結果顯示本系統可有效阻斷色情網站的存取；同時由於效果顯著方式簡單，已有其他地區學校加入並希望能引進利用。

With the popularity of WWW, fast information distribution greatly speed up the aggregation of knowledge. However, a variety of information on Web pages produces an unexpected problem-abusing information distribution, such as adult and violence. The article addresses how to find out adult contents on Internet and to avoid accessing them by a scalable simple approach. Considering the operation of TANet, we propose proxy-based approaches to filter abusing information. The approaches utilize existing domain name software as a special server. The cost is only a private domain name server and no extra load on the filtering system. Finally, we implemented a prototype to demonstrate our approaches. The system was installed at National Central University in Taoyuan to test its effect. The experiment shows that our system effectively blocks the retrieval to abusing information. Because of the great effect, many other institutions joint to our system and inform us to adopt the sy