Web Shield: A Modified Firewall to Detect Malicious Request

In this paper, a novel system (Web Shield) for dynamic detection and filtering of objectionable web content has been presented. Web Shield captures the URL requested by the client and determines whether it leads to any objectionable content. It is also able to check all child URLs of the requested URL. It uses simple text matching technique to detect and filter undesired web pages. It uses knowledge base to keep record of objectionable URLs. The proposed system and the existing systems such as browser setting and proxy server based filtering were tested over about 500 web sites. It was observed that proposed system performed much better than existing methods giving about 90% accuracy. This system is very useful for various organizations enabling blocking and filtering of undesired and objectionable web content.

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