Open Ports Scanner Help:
Open Ports Scanner is an enhanced netstat utility. For those of you who are familiar with network command line tools in Windows, netstat.exe should be a well known tool. This software extends functionality of this useful Windows networking tool. It brings you Windows graphical user interface, an ability to monitor open ports over time, selectively display only TCP or UDP connections. Additionally it maps open ports to the running processes and even allows terminating an open connection right from the program. Note that the underlying process is not terminated or "killed", you may just close TCP connection: right click on an open port that you would like to close and select "Close Connection".

Below is a screenshot of program settings. It allows you to control the refresh speed of the scanning timer and apply a filter, depending on open ports of what type or protocol you would like to display.

OS: Windows 2000, Windows XP, VISTA (all)