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by bouncycastle
2762 days ago
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A way I would pinpoint a hidden server would be to monitor different data center regions / networks for outages or congestion, while at the same time looking at the hidden server's ping reply. The response times alone can reveal a lot of information. Once I have the data center, I'm sure the data center admins can see which servers are using Tor, and help with pinpointing it further. No need for taps. |
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One can route Tor traffic for .onion servers through VPNs, or even through nested VPN chains. That makes it a little harder, because the hosting provider can't easily tell that it's Tor traffic. Also, one can run a private obfsproxy, which isn't listed or indexed by Tor.