F5 LTM Monitor for RADIUS

I am looking to create a monitor to do health check on two Duo Proxy servers, the challenge I am having is I cannot use the "radius" type because then when it does a health check I get Duo pushes for my username, so thats out. I just need to monitor the server is up and port 1812 is working, and if possible monitor a windows service. I am not sure how to monitor a windows service with an F5 monitor. Any help is appreciated.