Blocking International DNS

Joakim Aronius joakim at
Thu Nov 25 05:55:56 CST 2010

* Suresh Ramasubramanian (ops.lists at wrote:
> This isnt new - there have been proposals elsewhere for a resolver
> based blacklist of child porn sites.

Swedish ISPs are required to enforce a DNS blacklist for childporn, perhaps also other European countries. The list is maintained by the police (rikskriminalen), they have also published statistics on how many evil access attempts to child porn that they have blocked, i.e. legitimating their existence. They do however fail to mention that browsers usually resolve all links on the webpage it loads so it only takes a look at a page that links to an illegal site for the filter to score a hit... and pr0n pages tend to have a lot of links.. 

And once you get these things in place you never know where it will end...


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