When debugging HP Performance Center connectivity, determining if ports are opened is a key step. In the past I’ve used Netstat -A to identify what ports on the target host are listening. While it is useful, it only shows the ports the local host is listening for, it doesn’t indicate if the port is truly open through the firewall. Using TelNet is much more effective as it allows you to see if port is open from source to destination. Enjoy.
How to use:
Enabling TelNet:
StressingQuality 