Users are currently experiencing performance problems when using RDP to connect to Windows Terminal Servers. Even users connected to the data centre directly on fibre link are experiencing problems, so I don't believe the issue is the WAN.
Can anyone recommend a utility that shows the ICMP ping time, vs the time to respond to a SYN request on port 3389 (used by RDP). I hope that this would show periods when the whole Windows Server / Terminal Server is slow responding to packets / dropping packets, versus pinging the router on the same LAN.
I understand that this would not be a true "ping", but assuming that if we measured time for a port 3389 SYN to get a SYN ACK response, we could get an indicator of performance. I'd also want the tool to be tidy and properly end the sessions it establishes, to prevent it from becoming a SYN flood DoS attack...
I can see some tools available designed to perform "http-ping" on port 80 to check health of web servers, but nothing for port 3389.
Any ideas on how to monitor this would be greatly appreciated.