I have a few systems I need to monitor which are out of my control. Ideally I needed a simple ping RTT test to see the status of the link. These systems do not respond to my ping requests so I need to find a workaround. I was thinking I could use SSH or FTP ports (which do respond) to monitor RTT similarly.
I have used this as a part of simple checks but it does not return any response.
net.tcp.service.perf[ftp,,21]
This is also using Numeric (float) type of information. But it does not return any type of data.