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Windows has a feature called .NET TCP Port Sharing which allows different .NET applications to share the same TCP/IP port.

I would like to monitor the source and destination connections of each client and associate them to the relevant server side listener. How do I reliably & efficiently accomplish this?

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First time I've come across this net.tcp thing (not being a windows user). It sounds like a nightmare anti-pattern. Thanks microsoft. – lynks Dec 14 '12 at 14:48
Can you request that it is reported to your systems by in-app code? stackoverflow.com/questions/93162/… – jimbobmcgee Dec 14 '12 at 16:56
netstat on the server to determine host IP and source port along with the binary/PID serving the request? – schroeder Dec 19 '12 at 20:21

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I think the only real audit you can do here is to actually turn the service off. Besides that I think the only limit you can set are the authorized security identifiers (SIDs) which can be configured (as described here on msdn).

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