Investigating the Be/O2 block of The Pirate Bay

The news in the UK recently has been flooded with the news that major UK ISPs have been forced to sink The Pirate Bay. The ISP that I use, Be There have now implemented their block.

Visitors trying to access TPB are greeted with a page informing them that access to the website has been blocked. To begin with this block only effected HTTP traffic but before long, HTTPs was also blocked. I’ve been interested in how this has been implemented, so began investigating. Firstly I took a look at the HTTP communication between a normal client and The Pirate Bay:

$ HOST="thepiratebay.se";echo -ne "HEAD / HTTP/1.1\nHost: $HOST\n\n\n"|ncat $HOST 80
HTTP/1.1 200 OK
X-Powered-By: PHP/5.4.3
Set-Cookie: PHPSESSID=70e899d0720d92eae47ad4347813ef0d; path=/; domain=.thepiratebay.se
Set-Cookie: language=en_EN; expires=Sat, 08-Jun-2013 08:59:18 GMT; path=/; domain=.thepiratebay.se
Expires: Mon, 26 Jul 1997 05:00:00 GMT
Last-Modified: Fri, 08 Jun 2012 08:59:18 GMT
Cache-Control: no-store, no-cache, must-revalidate
Cache-Control: post-check=0, pre-check=0
Pragma: no-cache
Content-Type: text/html;charset=UTF-8
Transfer-Encoding: chunked
Date: Fri, 08 Jun 2012 08:59:18 GMT
Server: lighttpd

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