to check if port is open.

Step 3: Locate to the target port and view the corresponding PID in the final column. For example, the PID of port 2179 is 3800.

Step 4: Input tasklist|findstr “3800” and hit Enter on the keyboard to view which service takes up the port.

Step 5: To end up this service, run taskkill /f /t /im vmms.exe.

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How to find out which ports are used by a program?

I try to figure out which ports a specific program uses if they send data to the internet. Is there a tool which is able to find this out? Or do I have to do package inspection by using wireshark?

Background: I try to create a priority rule on my fritz!box 7490 router, so that some computer games are seen as real-time applications and there are as less lags as possible e.g. if someone in the network decides to watch videos on youtube while I am playing online.

3 Answers 3

Determine PID of your program

Check ports in third column of output from

• there is a space before PID to rule out inappropriate matches potentially coming from other columns (a little trick)
• /n keeps addresses in numeric form (without resolving) what causes the command to finish without delays (it should suffice for what you need)

If you are using windows you can use the free utility «Process Explorer» for this — among many other things. You have to run it in Administrator mode though.

If you are wanting to optimize something like a game or netflix streaming, then you don’t need to worry about the port on your computer — that is the client, and is (somewhat) randomly chosen from the higher range of ports. What you want is to find out what port(s) the service you are connecting to is provided on, and optimize connections to those ports from your machine (possibly by MAC address? or local lan ip)

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• 🔍 Какой процесс прослушивает порт на Windows?

🔍 Какой процесс прослушивает порт на Windows?

Как узнать, какой процесс прослушивает определенный порт в операционной системе Windows?

Эта статья поможет вам найти имя процесса, прослушивающего определенный порт в системе Windows.

Иногда при установке приложения вы могли столкнуться с проблемой типа «port in use».

Вы можете выбрать один из двух способов, указанных ниже.

Первый метод использует netstat, чтобы найти pid процесса, прослушивающего определенный порт, затем используется список задач, чтобы найти имя процесса по pid.

1. Использование командной строки

Используйте следующую команду, чтобы узнать идентификатор процесса (pid), прослушивающий порт 433 .

Вы можете изменить это значение для поиска другого порта.

В последнем столбце выходных данных отображается идентификатор процесса.

Приведенный выше вывод показывает, что pid равен 2189 и 4620 для процессов, прослушивающих порт 443.

Используйте этот идентификатор процесса с командой списка задач, чтобы найти имя процесса.

В результатах вы увидите имя процесса, как показано на скриншоте выше.

2. Использование PowerShell Get-Process

Второй метод использует команду PowerShell для определения процесса, запущенного на определенном порту в Windows.

Запустите терминал PowerShell и выполните следующую команду, чтобы найти имя процесса, работающего на порту 443.

Вы можете изменить номер порта, чтобы проверить наличие других портов.

В результатах вы увидите имя процесса, как показано на скриншоте выше.

Заключение

В этом руководстве вы узнали два метода поиска имени процесса, прослушивающего определенный порт в системе Windows.

Windows Kill Process By PORT Number [duplicate]

I’m using embedded Tomcat server in Spring Tool Suite IDE. My problem is when I run my project there is an error as follows,

There are some similar questions but none of the answers not working for me.

2 Answers 2

Run command-line as an Administrator

Please Make sure that new port you are going to set for your Application doesn’t listen to any other process

Solution 3: Another way is to terminate the process (in IDE) and clean and rebuild project.

UPDATE:

For solution 2, Please Make sure that new port you are going to set for your Application doesn’t listen to any other process.

How to check Port Status?

Run resmon.exe and go to Network -> Listening Port (Also can be viewed on TaskManager)

PowerShell

cmd

(Add -n to stop it trying to resolve hostnames, which will make it a lot faster.)

-a Displays all connections and listening ports.

-b Displays the executable involved in creating each connection or listening port. In some cases, well-known executables host multiple independent components, and in these cases, the sequence of components involved in creating the connection or listening port is displayed. In this case, the executable name is in [] at the bottom, on top is the component it called, and so forth until TCP/IP was reached. Note that this option can be time-consuming and will fail unless you have sufficient permissions.

-n Displays addresses and port numbers in numerical form.

-o Displays the owning process ID associated with each connection.

How do I determine which process is using a serial port?

The company I work for makes hardware that communicates to the computer though a serial port. Third party companies write software that communicates with our hardware.

There are times when I need to diagnose our hardware. However, a third party software app connects to the serial port when Windows starts up, blocking any other connection. I don’t know the name of this application/service and it’s not always the same one.

Is there any way to either:

• Find the name/pid of the app/service that is currently using a given serial port or
• Steal the serial port connection from another app.

vb.net preferably, but I’ll take a language agnostic answer as well.

3 Answers 3

You can use the process explorer tool also from SysInternals to search for open handles. In this case you would want to search for ‘Serial’ since it uses device names that may not map to com port numbers. (e.g. COM1 is \Device\Serial0 on my system).

If you want to take control of the serial port from another app I think you would need co-operation of the driver.

As Rob Walker said, you can find who’s using a serial port using Process Explorer. Most of the time, typing Ctrl + F and searching for «serial» will show you who has a serial port open, but I just ran into a situation where my «COM3» serial port’s handle appeared as «\Device\VCP0». It may be strange because it was running under VirtualBox with a USB-to-serial connector.

If searching for «serial» and «device\vcp» don’t get you any results, you may be able to figure out how serial port handles are named by opening one with a known program. In Process Explorer, display the lower pane with each process’s open handles by typing Ctrl + L . Click on the process that you used to open the serial port and look through the lower pane to see which handles look like they might be a serial port. You can open and close the port while you’re looking, and the file handle should appear and disappear, as well as being highlighted in green or red. Of course, this is only possible if you have more than one serial port or the serial port you’re trying to diagnose isn’t always locked by some mystery process.

Sysinternals has a slew of utilities I find very useful and educational for tracking down what processes are doing to the system.

They have a utility that does exactly what you need called Portmon, and give some information on how it works near the bottom of the page. That info and a few well-asked questions will probably give you everything you need to implement it yourself if the utility isn’t enough.