How? Detecting connection attempt via tunnel

Question

We have developed a variety of services with our own security measures to screen incoming connection attempts. We code to the framework sockets.
Yesterday in the news I saw that Netflix is disallowing tunnel connections. That is where someone from a foreign country gets source IP anonymity by tunneling through various proxy sites in the US, making it look like their connection came from within the
US where Netflix is allowed. We see foreign hackers trying to play the same trick with us, and I would like to circumvent that if possible.
Is there some way programmatically via .NET Sockets and listener that I can detect a connection attempt through a tunnel/proxy? If not, then is there any way?  There must be, because Netflix is already doing this.
Lee Gillie, CCP Online Data Processing, Inc. - Spokane, WA

Answer 1

Dear Poster,
WCF includes a large set of performance counters to help you gauge your application's performance. The Performance Counter component also enabled from Microsoft .Net Framework namespaces. So you can programming the WCF Performance Counters and monitor interesting
WCF counters, like the incoming connection attempts.
For more information, you can refer to
http://msdn.microsoft.com/en-us/library/ms735098(v=vs.110).aspx
http://msdn.microsoft.com/en-us/library/5f9bkxzf.aspxhttp://msdn.microsoft.com/en-us/library/system.diagnostics.performancecounter(v=vs.90).aspx
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