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Internet Filtering
July/August 2010 (vol. 8 no. 4)
pp. 62-65
Vijay Varadharajan, Macquarie University
Various governments have been considering mechanisms to filter out illegal or offensive Internet material. The accompanying debate raises a number of questions from a technical perspective. This article explores some of these questions, such as, what filtering techniques exist? Are they effective in filtering out the specific content? How easy is circumventing them? Where should they be placed in the Internet architecture?

1. V. Varadharajan et al., "Technical Observations on ISP Based Filtering of the Internet," Australian Computer Soc., 2009;
2. Mandatory Internet Service Provider (ISP) Filtering: Measures to Increase Accountability and Transparency for Refused Classification Material, Australian Dept. of Broadband, Communications, and the Digital Economy, Dec. 2009; transparency_measures.
3. C. Lumby, L. Green, and J. Hartley, "Untangling the Net: The Scope of Content Caught by Mandatory Internet Filtering," 2009; .

Index Terms:
Internet, Internet filtering, packet filtering, DNS poisoning, URL blocking, Web proxies, deep-packet-level firewalls, CleanFeed
Vijay Varadharajan, "Internet Filtering," IEEE Security & Privacy, vol. 8, no. 4, pp. 62-65, July-Aug. 2010, doi:10.1109/MSP.2010.131
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