View closed ports windows

Whatever the reason you need to check for open ports, this article provides detailed steps to check for open ports on Windows 10 using several readily available tools, either built-in or free to download and use.

There are a couple of handy tools you can use for scanning open ports in Windows. One of the simplest ways to check for open ports is to use NetStat. With NetStat , you can see open ports or ports that a specific host uses. Two commands are helpful, depending on your needs. Once this is done, these are the steps to follow:. If everything went well, we will see in the central panel of the advanced configuration window of the Firewall the rule that we have created. If what we have done is allow a connection, open the port , it will be shown with the icon in green, while if the rule has been to block a connection or close a port, the red icon will appear with the prohibited symbol.

If we are one of those who have already forgotten the Control Panel and prefer to access the settings to open or close Windows 10 Firewall ports from the configuration page, these are the steps to follow:. If the process is successful, we will see the rule we have just created to open or close a port in the System Firewall in the central panel of the advanced configuration window.

You can copy the command and paste it in the command prompt window by right-clicking inside it. In the resulting output, you will see the port number right next to the IP address ex: You can see the highlighted portion in the below image for better representation.

Keep in mind that the list will not be refreshed automatically. You have to execute the command again when you need an updated list. If you want the used port list to be updated automatically, use the below two methods. Nirsoft Utilities has a pretty neat and lightweight tool called CurrPorts which lists all the ports that are in use by Windows and other programs. First, download CurrPorts from the official website. After downloading, extract the exe file from the zip file and double-click on it to open.

The language monitor uses the OpenPortEx function to create and return a port handle. Typically, a language monitor calls its associated port monitor's OpenPort function, and the language monitor just returns the handle obtained from the port monitor's OpenPort.

If a language monitor is not associated with a port, the spooler calls the port monitor's OpenPort function directly. The spooler does not allow more than one path to a port to be enabled at one time. Thus, after it has called OpenPortEx or OpenPort in a particular monitor, it does not attempt to open the same port again before closing it.

After a port has been opened, the spooler can call additional functions to print a job, as described in Printing a Print Job , using the port handle as an input argument.