I need to measure Windows remote desktop latency for various cases, e.g. over a VPN, over a SSH tunneling, direct connecting etc; For that I found that a tool called
tcping is good for it.
So I download it https://elifulkerson.com/projects/tcping.php and tested if it works:
ssh -p 50022 -L 13389:localhost:3389 email@example.com # so now I can RDP to the machine specifying `localhost:13389` on mstsc.exe
$ tcping.exe localhost:13389 DNS: Could not find host - localhost:13389, aborting
But as you can see it gets an error. How can I solve this problem?