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In order to monitor TCP connections there must be a TCP Mapping service running in WinGate as this service is the one that accepts registration of the filters and pushes events to them.

Protocols

Because the TCP mapping filter framework sits at the TCP level, it is effectively protocol agnostic. Therefore when you write a TCP mapping filter you need to ensure that you either handle data of any protocol, or inform the user that they need to attach your filter only to the TCP mapping server that is dealing with protocol data that you can process.