How to determine which ports are open?

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2018-03-18 14:30:27

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We will Now deal with the question of what are the open ports. In this question you should understand if the Internet traffic begins “suddenly, to leave” into the unknown. First of all, you should see where, what program and what uses. Based on this information, you can correct the situation.

Network applications

open portsThere are times when you do not want to run the application that uses the network for its launch. If so, worth checking out are the ports that the program uses for its work. Situations when you need to find out the list of open ports, there are often enough.

To view the list, you must use either third-party port scanners or standard utility of Windows operating systems and Linux netstat. It runs from the usual command prompt. To get started call the command line. This can be achieved in two ways. Regarding the first option, click “start” point to “Perform”.

In the ensuing window, type “cmd” then click “Enter”. Another method is to run the necessary command line "with their hands”, that is, by navigating to the folder “System32”, use “cmd.exe”.

Netstat

To see which ports are open, run the utility “netstat”. To this end, in the command line that you launched earlier, enter “netstat”, then press “Enter”.

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Those users that this information is not enough, can access this utility by running it with a special key –h, in other words, try typing in the command line "netstat -h”. In the case of the use of the key “netstat-b” utility will show open ports and applications that use these ports for your own work.

There is another useful key is “netstat 5”. If you use it, you will see not only the open ports, but also the possibility of streaming updates of information, new data will be displayed every 5 seconds. To stop the emergence of information with a specific key, use the key combination “Ctrl+C”.

Study information

open whether portsA command Window will show the open ports. It will look like the following: directly command line will be divided into 4 parts. The left column will display the Protocol name, the second-domain, and after the colon itself an open port, the third part is an external address, the fourth state.

Opening ports in Windows

which ports are openNext, we'll look at how to open a port Windows. To perform the operation of opening ports on Windows 7 and Vista users can method use the standard tools of the operating system itself without the involvement of special software from third-party developers.

Press the button “start” to call up the main menu system, go to step "control Panel”, in order to initiate the procedure of opening ports in the Windows firewall.

Choose the paragraph “Security”, go to section "Windows Firewall". Select the item called “more settings”, which places itself in the left side of the application window. After that you enter the administrator password. It is necessary to enter in the corresponding field after the appearance of the login window.

Open the link which is talking about the allow a program through Windows firewall and select on inbound rules. Specify the paragraph titled "new rule" start the function "Add port" to perform the operation to open the specified port. Click “Next”, enter a name that allows you to associate the specified open port.

For this the appropriate field “Name”. Enter the number of the selected port in the appropriate field of the “Port”, click “Next”. Specify the desired Protocol (it can be either TCP or UDP) in the next dialog box, which deals with ports and protocols. Used the check box for the item "Enable connections", proceeding to the next window “Action”.

Final phase

how to open a port in windowsApply the flags for all fields in the following dialog box entitled “Profile”, click “Ready” to the application of selected changes. Press the button titled “Change scope" to select the number of computers that have permission to use the selected port. Specify the desired value.

Repeat the above procedure for each port that must be open. Restart your computer to apply the selected changes. It should be remembered that the described sequence of actions will allow you to open only the ports in the firewall of the personal computer, however not affiliated in any way with the permissions of a particular provider the Internet connection.

To solve such problems, you must appeal directly to the representative of your company provider. While connected to the Internet, the system allocates programs, network ports, through which the reception and sending of data. Ports can be not only open but also closed.

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AR: https://tostpost.com/ar/internet/11111-how-to-determine-which-ports-are-open.html

BE: https://tostpost.com/be/nternet/19878-yak-vyznachyc-adkrytyya-party.html

DE: https://tostpost.com/de/internet/19887-wie-offene-ports-ermitteln.html

ES: https://tostpost.com/es/internet/19899-como-detectar-puertos-abiertos.html

HI: https://tostpost.com/hi/internet/11120-how-to-determine-which-ports-are-open.html

JA: https://tostpost.com/ja/internet/11120-how-to-determine-which-ports-are-open.html

KK: https://tostpost.com/kk/internet/19875-alay-ashy-porttar-bar-ma.html

PL: https://tostpost.com/pl/dost-p-do-internetu/19850-jak-sprawdzi-otwarte-porty.html

PT: https://tostpost.com/pt/servi-os-de-internet/19849-como-determinar-as-portas-abertas.html

TR: https://tostpost.com/tr/nternet/19880-nas-l-tan-mlamak-i-in-a-k-portlar.html

UK: https://tostpost.com/uk/nternet/19872-yak-viznachiti-v-dkrit-porti.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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