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. As soon as you open the window, the application will list all the connections and their ports. You can find the port number under the Local Port section.
Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. It will show you all processes that use port Notice the pid process id in the right column.
If you would like to free the port, go to Task Manager , sort by pid and close those processes. In the menu, click "Run as Administrator" on Windows XP you can just run it as usual , run netstat -anb , and then look through output for your program. You can also use PowerShell to parse netstat output and present it in a better way or process it any way you want :. TCPView provides a more informative and conveniently presented subset of the Netstat program that ships with Windows.
You can then use the "tasklist" command with the specific PID that corresponds to a port in question. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. This range is in addition to well-known ports that are used by services and applications. Or, the port range that is used by the servers can be modified on each server. You adjust this range by using the netsh command, as follows. The above command sets the dynamic port range for TCP. The start port is number, and the total number of ports is range.
The following are sample commands:. These sample commands set the dynamic port range to start at port and to end at port ports. The minimum range of ports that can be set is The minimum start port that can be set is The maximum end port based on the range being configured cannot exceed This results in a start port of and an end port of Specifically, about outbound connections as incoming connections will not require an Ephemeral port for accepting connections.
Unable to sign in to the machine with domain credentials, however sign-in with local account works. Domain sign-in will require you to contact the DC for authentication which is again an outbound connection.
If you have cache credentials set, then domain sign-in might still work. Reboot of the server will resolve the issue temporarily, but you would see all the symptoms come back after a period of time. Try making an outbound connection. If the outbound connection fails for all of these, go to the next step.
Open event viewer and under the system logs, look for the events which clearly indicate the current state:. Collect a netstat -anob output from the server. This step-by-step article discusses how to determine which program uses or blocks specific Transmission Control Protocol TCP ports. For a Microsoft Windows XP version of this article, see The Netstat. This information can be used to determine which process program listens on a particular port.
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