Active Ports -
Quite often I'd like to know exactly which process are using which tcp ports on a remote machine.
I could of course use zonealarm, but try doing a remote install of zonealarm , then remote connecting to the machine afterwards.
I found this little util a lot nicer
http://www.ntutility.com/freeware.html
heres the manufacturer blurb about it.
I found it very usefull in troubeshooting rogue processesActive Ports
Active Ports - easy to use tool for Windows NT/2000/XP that enables you to monitor all open TCP and UDP ports on the local computer. Active Ports maps ports to the owning application so you can watch which process has opened which port. It also displays a local and remote IP address for each connection and allows you to terminate the owning process. Active Ports can help you to detect trojans and other malicious programs.