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This question already has an answer here:

I was trying to signup for a service provided by a website using Tor, the website prevented me and asked me to disable my proxy settings, he noticed me with the following:

Our checks indicate that you are connecting through a proxy at the moment. Please disable your proxy settings first and then try again. Thank you!

Then I tried a VPN connection with normal browser without any proxy settings, but the website still gives me the same notice.

My question is:

1- How can the website server detect my anonymity-based connection (Tor or VPN), what is the interpretation?

2- Is there a way to overcome this issue?

marked as duplicate by Neil Smithline, Bob Brown, Mark Buffalo, LvB, John Deters Mar 28 '16 at 0:42

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • While the question is phrased differently, the first answer applies here. Because it's all publicly known. VPNs too. – techraf Mar 26 '16 at 13:09
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One of the ways I know is based on checking IP against a known list.

http://www.gohacking.com/detect-web-proxy/

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They could check the source the incoming traffic with a public list of Tor network.

But if you want to actually bypass there firewall you could do the following:

  1. Use Tor and exit through a VPN. Keep in mind to use fake info or a public VPN.
  2. Ask Tor project to give you an unlisted Tor exit node. (They always have a few for guys from China ;) )

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