If you are a network admin, then you must download TCPView. This free tool from Microsoft’s sysinternal team shows a detailed listings of all TCP and UDP connections on your computer system, including the local and remote addresses and state of TCP connections.
TCPView is a simple but a powerful tool to monitor and track all TCP and UDP endpoints on any computer system.It is infact the best tool available for this purpose. On Windows Server 2008, Vista, and XP, TCPView also reports the name of the process that owns the endpoint. TCPView provides a more informative and conveniently presented subset of the Netstat program that ships with Windows. One can use TCPView to identify the applications on your PC that is using any port. For example, if port 80 is used by any application, you can easily find out the application that is currently using the port on your computer.
TCPView s a free standalone software and it works with windows 7, Windows XP, windows vista and more.
How to use TCPView?
TCPView is a very user friendly utility. as soon as start this utility, it will enumerate all active TCP and UDP endpoints, resolving all IP addresses to their domain name versions. You can use a toolbar button or menu item to toggle the display of resolved names. On Windows XP systems, TCPView also shows the name of the process that owns each endpoint.
By default, TCPView updates every second, but you can use the Options=>Refresh Rate menu item to change the rate. Endpoints that change state from one update to the next are highlighted in yellow and those that are deleted are shown in red. New endpoints are shown in green.
You can close established TCP/IP connections (those labeled with a state of ESTABLISHED) by selecting File => Close Connections, or by right-clicking on a connection and choosing “Close Connections” from the context menu.
You can also save TCPView’s output window to a file using the “Save” icon .
How to use Tcpvcon?
The TCPView download also includes Tcpvcon, a command-line version with the same functionality.Tcpvcon is bundled together with TCPView. Using Tcpvcon is very similar to that of the built-in Windows netstat utility.
tcpvcon [-a] [-c] [-n] [process name or PID]
- -a – This option Show all endpoints (default is to show established TCP connections).
- -c – This option prints the output as CSV.
- -n – This option may be used to tell Tcpvcon, not to resolve IP addresses..
TCPView isa free software from sysinternals team and it details all TCP and UDP endpoints on any computer system, including the remote address and state of TCP connections as well as the software or process that is using the TCP connection.You can not only monitor the TCP connections but you can also terminate selected processes and close selected connections.