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Originally Posted by Toto
ntl uses proxies, simple as that and so does Telewest and others already mentioned.
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Telewest dont force proxies.
Most of the time it isnt the web server software itself doing the blocking its a firewall or some other anti ddos filter. Inspecting packet data is expensive which is why many hosts just check the REAL src address, I do it myself on my own servers, when a flood of requests is recieved from an ip it is blocked I dont insect the content of the packets only the type of packet and src and dst are checked.