What is the best type of adult content filter? How do they work?

Replies

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  PraveenKumar Purushothaman

  Filtering rules are typically set by a central IT department and may be implemented via software on individual computers or at a central point on the network such as the proxy server or internet router. Depending on the sophistication of the system used, it may be possible for different computer users to have different levels of internet access.
  
  Common content filtering methods include:
  

  • Attachment - The blocking of certain types of file (e.g. executable programs).
  • Bayesian
  • DNS Based filtering - Cloud Delivered Enterprise Security by OpenDNS
  • Char-set
  • Content-encoding
  • Heuristic - Filtering based on heuristic scoring of the content based on multiple criteria.
  • HTML anomalies
  • Language
  • Mail header - Filtering based solely on the analysis of e-mail headers. Made less effective by the ease of message header forgery.
  • Mailing List - Used to detect mailing list messages and file them in appropriate folders.
  • Phrases - Filtering based on detecting phrases in the content text.
  • Proximity - Filtering based on detecting words or phrases when used in proximity.
  • Regular Expression - Filtering based on rules written as regular expressions.
  • URL-Filtering based on the URL. Suitable for blocking websites or sections of websites.

  Most content filtering systems use a combination of techniques.
• 

  born_star16

  Blocking porn contents is very difficult actually as there are a large number of web proxies and ip-addresses which allow you to unblock it. Even for Facebook or any social networking sites (which are banned in some colleges), you can use it.