When the GFW suspects an IP is acting as a proxy, it sends its own "active probes" to that server to see how it responds. Silent Drop:

Would you like to know more about internet censorship in China or how to set up a proxy server?

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Work | Konoha Proxy China

When the GFW suspects an IP is acting as a proxy, it sends its own "active probes" to that server to see how it responds. Silent Drop:

Would you like to know more about internet censorship in China or how to set up a proxy server?

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