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Old 25-04-2008, 19:36   #4853
AlexanderHanff
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Re: Virgin Media Phorm Webwise Adverts [Updated: See Post No. 1, 77, 102 & 797]

Quote:
Originally Posted by JHM View Post
Not sure if your first paragraph is correct.

The BT produced schematic for how the trial will work, shows that if there is an opt-out cookie present or if you block Webwise.net, then you data goes nowhere near the profiler. See: http://webwise.bt.com/webwise/customer_choice.html

However, if you op-in to the trial and then block Webwise.net, then my understanding is that your browsing could well grind to a halt.

John
Nope not quite correct. If you are in one of the exchanges being used for the trial irrespective of whether or not you opt-in, if you block the webwise domains in your hosts file by redirecting them to localhost (127.0.0.1) then you will not be able to browse the web.

The reason for this is all traffic for the entire exchange will be passed through the Layer 7 technology during the trial and then redirected as described by Dr Richard Clayton to a "special machine" masquerading as the web site you want to access. This is the main consequence of the cookie system they are currently using.

If you note the correspondence R Jones had with BT (above) you can see it states any user who is "invited" to the trials, not any user who "accepts" an invite. When you read that statement and understand the technical analysis by Richard it is clear that this will include everyone in the exchange as it specifically needs to go to the webwise domain to get the opt-out cookie. If you redirect to localhost that cookie will never be set and you will be stuck in a loop. The loop that Kent stated could only ever effect a maximum of 1% of customers...

Alexander Hanff
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