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A quick and dirty Windows Service to start and stop network services on-demand.
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Adam Pippin d1cbec25cb
Add README 		3 years ago
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README.md

KnockKnock

A Windows Service for providing services on-demand.

Overview

KnockKnock acts as a TCP proxy, accepting connections and then forwarding all traffic between a client and upstream. It allows you to register commands to run when the service is idle (no open connections) and active (incoming connection(s)).

For example, when forwarding connections to a Hyper-V VM, you could suspend the VM when there are no active connections, and resume it whenever a user attempts to connect.

(Personally, this is how I use it--allowing my development VM to be suspended automatically when I am not connected to it through RDP.)

TODO / Limitations

This is basically the minimum viable app that solves my own problem. I slapped it together in less than an hour.

Configuration is hardcoded: it only forwards :1234 -> 10.200.0.10:3306; it always runs SuspendVM and ResumeVM against the Debian Hyper-V machine. The socket code is kind of janky and some activity patterns will make it explode.

It works for me to proxy a Microsoft Remote Desktop Connection session through to a Hyper-V VM available on-demand.

License

None. Do not redistribute.