How to open port 27000 on Windows 10. Ways to open ports on Windows. How to check if a port is open on a server

The Windows Firewall (aka firewall) is responsible for the security of the operating system and protects it from external malicious attacks. To effectively protect their computer, every user must know how to work with a firewall and what alternatives can be used.

Do you need a Windows 10 firewall?

Of course it is needed. Here simplest example: V latest versions Windows (starting from 7) joint management of devices on the same local network has become available. It is thanks to this that in offices several computers can have access to the same printer or any other device. When you disconnect your PC from the network, you don’t even think about the danger that an “unsafe disconnection” might pose. The fact is that attackers can easily connect to a computer in order to realize their dirty intentions. It is worth mentioning that they cannot, but they could. They could if the firewall was not built into the system. The firewall does not allow “dangerous” incoming and outgoing traffic and blocks suspicious activity, which helps keep you and your device safe.

Why does it block apps?

The firewall blocks programs because it already has a built-in “moral code” - a set of rules, the violation of which prevents a data packet from being downloaded to the computer. These rules can be changed at your discretion. If you want, block all connections to your device, if you want, block access to the Internet for some specific program if it causes mistrust. Blocking various resources helps make your online experience safer.

How secure is the Windows 10 firewall?

The built-in firewall performs the same functions as downloadable antiviruses. Unlike them, it sends notifications much less frequently, has no advertising and does not require paid activation. The firewall runs continuously in the background and cannot be disabled without your command. Therefore, you can rely on it without the need for additional software. If an application needs access to certain parameters of your computer, a request will come from the firewall, which you will have to confirm.

The firewall requests user confirmation to continue running the program

How to set up a firewall

The firewall can be configured in several ways.

How to open a port in Windows 10 Firewall

1. Go to the Start menu, there we will need the Control Panel.

   Open the Control Panel

2. Click on “System and Security” and click on “Firewall”.

   Open Windows Firewall

3. In the firewall menu we find Extra options.

   Select Additional options

4. Select Rule for incoming connection and add the necessary ports.

   Create a new rule for incoming connections

5. Click “Next” and enter SQL Server in the “Type” line.

   Selecting the rule type

6. We indicate TCP port and the ports we need.

   We indicate the necessary information. In our case it will be port 433

7. Select the desired action. For us it will be “Allow connection”.

   Select “Allow connection”

8. In the “Name” line, enter our port number.

   To complete the setup, call our port by its number

Video: How to open ports in Windows 10 Firewall

How to add to firewall exceptions

Video: setting up and disabling the firewall in Windows 10

How to block an application/game in a firewall

To block an application in the Windows Firewall, or in other words, prevent it from accessing the Internet, you must follow these steps:

1. Select the “Advanced Settings” section in the firewall menu.
2. Click on “Outgoing Connection Rules” and click “Create Rule”

   Create a new rule for the application

3. Next, select the rule type “For program”.

   Since we need to exclude the program, we select the appropriate rule type

4. Next, the system prompts you to select the program path. Click the “Browse” button and find required file programs.

   Leave all the boxes in place

5. And at the end, we designate the name of the blocked program in a convenient way and click “Finish”. From this moment on, Internet access for the application will be blocked.

Video: blocking Internet access for individual programs

Firewall Update

Updating a firewall is a controversial and rather negative thing. The fact is that it does not carry any important functions, but it often takes a considerable amount of time. Therefore, some people prefer to disable firewall auto-update.

The Firewall control application is one of the auxiliary programs and is responsible for data security and protects against leakage of this data to the network. The program controls the operation of ports and allows you to choose under what conditions applications will connect to the network.

The program interface is simple and concise

The modern Internet is not only a collection of web pages linked by hyperlinks. The term “Internet” includes any digital information, sometimes used completely different devices. Torrent clients, file-sharing networks, software components automatic update, numerous instant messengers and “smart” gadgets - they all use Internet traffic, and it can be transmitted through the same server. In theory, when one server serves tens of thousands of different services, real confusion should arise, but this does not happen, because each client has its own IP address on the network. But this may not be enough.

What are ports in Windows 7/10 and why are they needed?

To distinguish between requests and optimize the connection, protocols and ports are also used. The latter will be discussed today. So what are ports, why are they needed, how can you find out which ports are open on your computer and why should they be open or, on the contrary, closed?

A port is a virtual unit, channel, connection number with a remote client or server, allocated to a particular program. Unclear? Let's try to explain more clearly. Imagine a huge building with 65,535 doors. These doors are not simple, leading to internal rooms, but magical, leading to other similar buildings. The house with many doors is your computer, and the doors are ports through which programs establish connections with other computers.

When an application wants to access the network, it reserves a specific port number for itself, so there is no confusion when exchanging numerous data. When the program exits, the port is released, although some ports have their own exceptions. For example, ports 80 and 443 must be open constantly, otherwise some programs will not be able to connect to the Internet, unless their algorithms provide the possibility of an alternative connection. It is advisable to keep other ports locked to avoid network attacks and exploitation by malware.

How to check if a port is open

The concept of a “port” is more or less understood, now let’s find out how to check whether a port is open on a computer or not. There are several ways to check the availability or unavailability of a port(s). The simplest and most obvious is to use online services PortScan.ru or 2ip.ru. To determine whether a port is explicitly open or not, you need to enter its number in a special field and click the “Check” button.

PortScan.ru and similar services also often provide scanner services for open ports on a computer.

Look open ports in Windows 7/10 you can also use the regular command line or console PowerShell running with administrator rights. To do this, run the following command in the console:

netstat -aon | more

In this case you will receive a list active connections. In the “Local address” column the IP and the actual number of the open address will be indicated. this moment port. Please also pay attention to the connection status. LISTENING means the port is just listening (waiting for a connection), ESTABLISHED– there is active data exchange between network nodes, CLOSE_WAIT– waits for the connection to be closed, TIME_WAIT indicates that the response time has exceeded.

Alternatively, you can use free utility CurrPorts from the famous developer NirSoft.

The advantage of this utility is that it visually shows not only the local and remote ports used, but also the processes and services associated with them, as well as the paths to their executable files, their version, description and much more. useful information. Additionally, CurrPorts can be used to close selected connections and terminate processes on selected ports.

How to open ports on a computer using Windows

We already know how to determine open ports, now let's see how to open ports on Windows 7/10. As a rule, the standard Windows firewall is used for these purposes. Let's assume that we have closed port 25, used by email clients via the SMTP protocol, and we need to open it. Launch the standard firewall and click on the “Advanced settings” link on the left.

In the new window select Rules for incoming connections – Create a rule.

The rule type must be selected “For port”, the protocol is left as default, that is, TCP, and in the “Specified” field local ports"enter the number of the port we need.

If you need to open several ports, add them separated by commas. Click “Next” and specify the action, in this case “Allow connection”.

And finally, we move on to the last stage of configuration - assigning a name to the rule. The name can be arbitrary, the main thing is that it reflects the essence of the rule.

Why should ports 80 and 443 be open?

Among the many ports, there are those that are reserved by popular programs by default. For example, ports 80 and 443 are used primarily by browsers (80 for regular and 443 for secure encrypted connections). If these ports are closed, certain problems may arise when connecting to gaming and cloud services, conducting transactions and the like. However, you should not rush to open ports 80 and 443 if they were closed as a result of the scan. If there are no connection problems, it is better to leave everything as it is.

How to find out which ports a specific program is using

You already know how to open a port on a computer with Windows 7/10, now let's see how to determine which program or process is using a particular port. To search for open ports on a PC, we have already suggested using the CurrPorts utility. With its help, you can quickly determine which one is involved in any device running on your computer. network program port.

Let's say we want to find out which port the program for hiding the IP address occupies FreeHideIP. We launch the CurrPorts utility, find the FreeHideIP process in the first column and look in the “Local Ports” column for the number of the port it uses.

You can determine the port used by the program without any third-party tools, using Windows itself. Let's resort to the help of an already familiar utility netstat. Open as administrator command line or PowerShell console and execute the following command;

netstat -aonb | more

This time we added the parameter to the list of enabled keys b, responsible for displaying the process name. For example, in the attached screenshot you can see that one of the processes Chrome browser with ID 5732 is currently using local port 61233. In principle, you can not use the b key, but then you will need Task Manager.

Computer ports provide communication with computer applications and services, so there is often a need to check whether a port is open on your computer. This is often the reason why an Internet service does not work.

So, in order to check whether the port is open or not on your local computer running Windows 7 and higher, you must:

1. Press the key combination “Win+R“
2. Enter the command appwiz.cpl:

press the “OK” button

3. In the “Programs and Features” window, click on “Turn Windows features on or off” and check “Telnet Client” in the list of components:

Click on the “OK” button and restart your computer if required.

click on the "OK" button

5. In the command line window, enter telnet:

and press the "Enter" key.

Press "Enter" key

7. If the connection is established, the following window will appear:

In case the connection could not be established:

remotehelper.ru

How to check open ports via command line. Remember, hackers are out there somewhere.

Windows Settings

Friends, in a recent publication dedicated to fans of the game Minecraft, I once again focused on the fact that network security- this is our everything. After all, no one wants some bad guy to gain access to your personal electronic wallet, or, for example, encrypted all files on the computer.

Of course, we all use modern antivirus solutions, but sometimes we ourselves give attackers another reason to come visit us without an invitation. I now mean “forwarding” ports for the needs of various online games and others network applications.

Therefore, it's time to talk about how to check open computer ports through the command line. And believe me, it's very simple. Even a first grader can cope with this. 😉

All further actions will be shown using Windows 10 as an example, although in other versions of this OS everything happens similarly. So, let's begin to “conjure”. To do this, first of all click right click mouse on the "Start" button and open the command line.

In it we enter a simple command like the following:

After this, the scanning process will start. Naturally, here you need to wait a little, so you need to stock up on patience or tea. 😉 And so, in the picture below, open ports are shown in a yellow frame. As you can see, in the “Status” column they are marked as “LISTENING” (that is, listening).

If instead of this value there is the inscription “ESTABLISHED”, it means that at this time the connection is established and data is being transferred between two network nodes. This is how it looks visually.

Look, the second and third columns show the IP addresses of these nodes. In my case there is no danger, since the address "127.0.0.1" refers to the same local computer. That is, everything happens within the confines of a home computer, there is no external threat.

The general list may also contain values ​​like "CLOSE_WAIT" (waiting for the connection to close) and "TIME_WAIT" (exceeding the response time). Pay attention to the screenshot below.

Okay, so we found out which ports are open, but what to do next with this facility? It's actually simple. Let's consider the situation at real example. Let's say we want to find out which program opens port "1688" (it is highlighted in the figure above).

To do this, you need to copy the value from the last column, which is called "PID". In our case, this is the number "9184". Now you should open the manager Windows tasks by simultaneously pressing the "Ctrl+Alt+Del" keys, and then go to the "Details" tab.

Next, in the “Process ID” column, you can easily find the value we need and understand what kind of application is using it. By right-clicking, for example, on the name of the process involved, you will be able to read about it on the Internet or immediately go to the folder where its executive files are located.

This concludes the story about how to check open computer ports via the command line in Windows 10 and 7 versions. If you have any questions, ask them in the comments to the publication.

And soon I will show you another specialized program for these purposes, which is designed to further automate the process of identifying active network connections. That's all for now and let's watch an interesting video.

Sincerely, Vitalik Komarovsky

Updated: 07/20/2017 - 00:17

pronetblog.by

Check open ports in a minute

Good afternoon, dear readers and guests of the blog, I am glad to welcome you again to the section about security, last time we learned how to remove a screenup virus, today the topic will be more interesting, namely how to check open ports on Windows or Linux. I’ll describe my situation, I have a project, the customer provided 20 virtual machines, within the framework of which my organization must deploy a service there, some virtual machines are located on different networks and while the programmers have not had time to deploy everything on them, I need to use a special utility to listen to a port on one server and check that it responds on the other, so to speak network interaction. Let's do this.

As I wrote above, while the services are not deployed, no one is listening to the ports, but we need to check so that we don’t have to deal with this later. We need to use a special utility to emulate listening to the port (socket) we need. Those of you who know an operating system like Centos 7, they remember that it had an excellent utility called netcat. It allowed using certain commands to listen to the port required by the administrator.

netcat is a Unix utility that allows you to install TCP connections and UDP, receive data from there and transmit it. On Windows platforms, she is also present.

You can download netcat for Windows here

We unpack the archive on the server where the service will run in the future. In the folder you will need the files nc.exe and nc64.exe. Next, hold down Shift and right-click on the folder from context menu select "Open command window"

Now imagine that I want port 80 to work on the server, well, like an IIS server. Open netcat, first look at the help:

• -d detach from console, background mode
• -e prog inbound program to exec
• -g gateway source-routing hop point[s], up to 8
• -G num source-routing pointer: 4, 8, 12, ...
• -h this craft
• -i secs delay interval for lines sent, ports scanned
• -l - listen for incoming connections
• -L listen harder, re-listen on socket close
• -n numeric-only IP addresses, no DNS
• -o file hex dump of traffic
• -p - which connection will be listened to
• -r randomize local and remote ports
• -s - set local address appointments
• -t answer TELNET negotiation
• -c send CRLF instead of just LF
• -u - UDP mode
• -v verbose
• -w secs timeout for connects and final net reads
• -z zero-I/O mode

We are interested in a command like this:

netcat-win32-1.12>nc.exe -l -p 80

As a result, a virtual socket is raised on the server that listens to connection 80, simulating a web server.

How to check if a port is open on a server

Now let's go to another server and try to check the open ports on remote server. To solve our problem, we will use the telnet utility; see how to install it here. Open the command line and enter the following line:

As you can see, I indicated the IP address I needed and desired number port

By the way, you can check the open ports on the computer where the service is located with the command:

telnet localhost number 80

If the IP address does not respond to your request, then you will see an attempt to connect, after which you will be shown that this could not be done.

If the connection is successful, then you will see a black screen, either without text, or with some kind of welcome message that some service has responded to you.

Through external utilities

You can also check whether the port is open using external utilities; the main requirement here is that you have a white IP with Internet access. Let’s imagine the same situation: you need to test the 80 connection on which the company’s website will be located. You deployed it, but for some reason it doesn’t work. Not long ago, I told you about the ping.eu service (here). One of the items in this toolkit was port check (checking open ports). In the "ip address or host name" field you write the IP address or dns name service, which requires checking, and in the adjacent field, the required socket number, in my case 80, click “Go”. In a second, you will get the result whether ports 80 or 443 are open on the site or not. In my case the status is "open".

Mass checking of open ports on the network and locally

Exist special utilities, whose task is to scan a computer or server for available ports on which there is a connection, they are called port scanners. There are a lot of such programs, I will give an example in the form of XSpider 7.7. How to check if a port is open in the XSpider 7.7 utility. Right-click on “scanned hosts” and add a host or range of IP addresses.

You specify what exactly will be checked.

Click the start icon and start the procedure.

You may see a warning that your actions may be detected as ddos attack and many firewalls online can simply ban you, so be careful.

As a result, the scanner pointed out to me that there are problem areas, for example, the 445 connection, through which ransomware recently climbed, we quickly close it.

As you can see, checking open connections is very simple. There are also two useful utilities that show the local services being listened to, I also talked about them in detail, these are netstat utility and the TCPView program (I recommend checking it out)

• An example of the netstat utility working

• An example of how the TCPView utility works

They both show what happens to you operating system. I think you have no questions left on how to check open ports and understand who listens to them.

pyatilistnik.org

How to find out open ports and scan for malware.

2014-05-02 16 46300 Feedback

But, before we begin and begin to identify open ports and the programs that hang on them, I would like, for general understanding, to explain in the simplest language and talk briefly about what a port is and the type of programs that work according to the “Server - Client” type »

As you understand, I will not delve very deeply into the essence of the issue and talk in technical, complex language about what a port is, why it is needed, etc. I will try to briefly and in understandable language explain to interested people what it is and why!

If we talk about malware, the situation looks like this. There are two programs “Program - Server” and “Program – Client”. The principle of operation of such things is as follows:

Program – Server: Always runs on the computer to which you want to gain unauthorized access.

Program – Client: Launched by the creators themselves or simply by the user to control a remote computer!

A person using “Client” sends the commands he needs, which the server understands. The server, in turn, accepts commands and performs appropriate actions on the remote computer.

Such malicious things that we are talking about at the moment are called “BackDoor” One of the types of malicious software.

I think this is clear. The server runs on the computer that needs to be robbed, the client runs on the computer from which the attack occurs.

How are connections made? So that the “Client” can connect to the “Server” and gain access to to a remote computer The “Server” opens some “PORT” and waits for a connection from the client. Any port can be opened, but in the range “From 0 to 65535” these are the limitations of the TCP/IP protocol

When the “Server” starts, the following happens: The server program opens a certain port, for example “3123” when a request comes from the client to port “3123”, the server understands that it is for him and processes the received data.

By the way: The client must always know exactly what port the server is on.

Since there are also legal programs that use certain ports, for example email clients, they always take port 25 for sending mail and 110 for receiving. There are many other popular programs and for this reason the range “0 to 1023” is reserved for all popular things.

That's why malware I rarely use port numbers from the range “0 to 1023”. If you notice that, for example, port 3123 is open, and you did not help open it, you should make sure that the port is being used by a legitimate program, otherwise you should find and terminate the program that opened this port...

As I said above, we will find out open ports using Windows without using third party programs and especially online services. To work, we only need the command line.

We run “cmd.exe” and get a list of open ports, as well as the “PID” of processes that use the ports. To do this, use the “netstat” command with the parameters “-a -o” and for convenience, save the result of the command to the “*.txt” file on the “C:\” drive

The final command is:

netstat -a -o > C:\Port.txt

After pressing the “Enter” key, you will need to wait a little, not long.

After executing the command, the file “Port.txt” will appear on drive “C”. In this file we can find out the open ports and the “PID” of the processes that occupy the ports.

Looking through the file you will notice more than one open port on your computer, and some of them are very suspicious. In the screenshot below, I marked the port “3123” that is already familiar to us; I suggest you look at what program it was opened by.

To get the name of the process by its “PID”, use the “tasklist” command and see what kind of crap has opened this port on our computer.

For reference: It was possible to initially use the “netstat” command with the “-a -b” ​​parameters, in which case we would immediately get the names of the processes.

The result of executing the “tasklist” command is also saved to a file on disk for easy viewing.

tasklist > C:\ PID.txt

As a result, we get the file “PID.txt” and knowing that port “3123” was opened by a program with “PID - 3264”, we find it and look at the process name.

As you can see, I didn’t try to imagine the name of the program “123.exe”, I decided to just call it “123” and that’s it))

Collecting information about the file and ports:

After receiving a list of open ports, you can find out more information about them. Just use the search “google.ru” and see what they write about this or that port, and then draw conclusions.

Also search the Internet for the names of processes that seem suspicious to you.

You can find a lot of information and find out whether such and such a process is a threat or not. The fact is that some system processes They can also open some port for their own purposes and there is no need to kill them, since this can lead to some kind of malfunction in the operation of the entire system.

In custody. We learned - How to find out open ports on a computer using the “netstat” command. You can get more information in the help itself for this command.

As I said above, you could simply use the command parameters “-a -b” ​​and not worry about getting the process name with the “tasklist” command. I did this on purpose to briefly demonstrate for general understanding the operation of the “tasklist” command.

I hope I was able to clearly answer the question, How to find out open ports. And you will no longer have difficulties if you need to find out open ports and programs that use them.

winkomp.ru

How to open ports on windows

Life now revolves around computers software and the Internet. Many people use it all the time various programs to make work or entertainment easier.

Due to the programs' requirements for a stable high-speed Internet connection and the opening of certain ports, many encounter problems with the performance of some applications. If they are closed, the software may not be updated or simply not work correctly.

Most simple option will take advantage of the free ONLINE service checking their availability. Sites such as 2ip.ru or PortScan.ru can easily help you with this.

If you want to check availability and open them on Windows, you need to start the telnet service. To do this, in Explorer you need to follow the path: “Computer”? "Remove or change a program"

In the window that opens, in the left column, select “Turn Windows features on or off.”

In the list " Windows components» Check the boxes “Telnet server” and “Telnet client”. Then go to command windows string, you can do this by pressing “+R” and entering cmd.

Once in the console, enter telnet 127.0.0.1 110 (127.0.0.1 is the local address of the computer, 110 is the port).

If the connection is established successfully and no error message appears, then everything is fine.

If an error message appears, the first thing to do is check the firewall and installed firewall, perhaps the problem is with them. But remember, if everything is fine on the computer, this does not mean that everything is configured correctly on the router too!

How to open a port in a firewall

If the firewall is enabled in Windows, check whether it blocks programs from accessing the Internet. You can get into the settings in several different ways:

1. “Start”, go to “Control Panel”, open “System and Security” and go to “Windows Firewall” (Windows 7);
2. Enter the word “Firewall” in the search bar; the system will display an icon to navigate to (Windows 8 and higher);
3. Press the “+R” keys and write firewall.cpl, “Enter” (universal method).

Once logged in, follow: “Advanced settings” a new window will open in enhanced security mode,

Select “Rules for incoming connections” in the left menu?

Is there a “Create rule” button in the right menu? The window for creating rules “For a port” will open.

Next, select the protocol type “TCP” or “UDP”; most programs use the first protocol, but if you need both, you will have to create two rules. At the bottom of the window, select “Specified local ports” and write the number that opens.

In the next window, select “Allow connection”. In the remaining items we leave the standard values, just do not forget to enter a name for the rule.

If the program still does not work, you can create a rule allowing the program free access to the Internet. To do this, again select “Create a rule” – “For the program” – Specify the path to it – “allow connection” – Enter the name – “Ok”.

Or you can simply turn off Windows Firewall.

If the setting or complete shutdown the firewall did not help, then check the firewall installed on the computer and the router settings.

How to open a port in a firewall

If third-party firewall programs are installed, you don’t necessarily have to worry about setting up network policies (see What programs are needed for your computer).

Every modern defender has a “Trusted Applications” or “Exceptions” function. All you need to do is go to “settings” - “applications” - and select the item there - “Add exceptions” or “Trusted applications” and then specify the path to the program file.

It is enough to specify a shortcut on the desktop.

Don't forget to also add your application to your antivirus exceptions.

If all this does not help, then you should check if everything is okay with the router.

How to open a port on a router

If after the above steps the software still does not work, then all that remains is to check the router. the main problem in this case, it is that router models differ in interface and functional settings (see How to choose WiFi router for home).

The tips given apply to several of the most common brands.

Enter the standard IP address – 192.168.1.1 – in the address bar of any browser, the administrative interface of the router will open, enter the authorization data. In rare cases, manufacturers use a different IP; if the standard one does not fit, then the required one can be found on the back of the router, where its address and login/password are written.

Once you have entered the web interface, you must enter your login and password. The further path may vary depending on the manufacturer and model.

TENDA

“Advanced”? "Advanced Setup" ? NAT? "Virtual Server" (Virtual Servers Setup).

1. Click the “add” button, in the “Select a Service” item, select one of the ready-made templates, in the “Server IP address” line, indicate the PC’s IP in the form of a mask: “192.168.1.” without the last digit.
2. In “External Port Start”, specify the required port, in the “Protocol” drop-down list, select “TCP”, “UDP” or “TCP/UDP” - apply the “APPLE/SAVE” changes. The remaining lines will be filled in automatically.

D-Link

"Advanced settings"? " Firewall""Virtual server"? "Add".

1. In the template we set Custom,
2. Start/end external port – set the number that needs to be opened or the range,
3. Internal IP - write the computer address, look in network settings windows,
4. Protocol – it is better to set TCP, but if the program requires “UDP”, select it.

TP-Link

Forwarding? Virtual servers? "Add".

• Service port - write what we want to open,
• IP address - computer IP.

ASUS

Internet? Forwarding? At the bottom in the “add/remove” column, click on the plus.

• Service name – any name, the router redirects incoming data packets,
• The protocol is the same as in the previous paragraphs.

Having done all this, do not forget to add your program to the antivirus exceptions; it can also block access to the Internet.

Today, many computer users are faced with the problem that most applications or video games require stable operation opening certain ports. This article talks about how to open ports on Windows 10, although it can be said that on more earlier versions OS Windows given the problem was solved using the same standard methods that will be described below.

Purpose of ports

Technically speaking, a port is a network transport protocol parameter that provides independent packet data transmission for various programs running on the same host. If we talk in simple words, then this is like an apartment number from the address of a paper letter - without indicating given number, the message (data packet) simply will not be delivered to the recipient. It is important to understand how to open a port on a computer with Windows 10, since the updated interface and wide functionality of the system make this procedure difficult.

Using a firewall

First, let's look at detailed algorithm steps that will help you understand how to open a port in the Windows 10 firewall, and then we will mention the main values ​​​​for this network parameter and what they are needed for.

1. Go to “Windows Firewall” through the Control Panel.
2. Select the “Advanced parameters” item and go to the rules subsection shown in the screenshot (1). As the name suggests, it will open full list rules for incoming connections. To add your own rule, you need to click the corresponding button (2).
   
3. Since we are talking about opening a new port, you need to select this particular type of rule in the window that opens and continue creating by clicking “Next”.
   
4. In the next window you need to select the connection protocol (TCP/UDP) and specify specific values that will be open. The setup wizard in the form of an example (below the line where the number is entered) shows how to enter a list or range of values ​​if we are talking about a large number of them with each number arranged in turn. You should not check the box to open all local ports. This action will lead to the formation of a huge hole in the protective screen of the operating system and will allow anyone to connect to the computer.
   
5. In the next window you need to select the option of the action that will be performed with the specified values. In our case, they need to be allowed, but they can also be included in the “For secure connection» or block.
   
6. Clicking “Next” again will lead to a window where you will need to select local network profiles for which the created rule will be used.
   
7. Then all that remains is to enter a name for the rule and confirm its creation by clicking the “Finish” button.
   

Naturally, immediately after the entire creation procedure, the new rule will be added to the list for incoming connections.

A completely identical algorithm is used when working with outgoing connection rules that will be created from Windows 10 used by the computer owner.

Main ports and their purpose

Speaking about how to create ports, one cannot help but talk about what they are and what certain values ​​are intended for. After reading this information, you can talk not only about how to create a rule for a specific type of connection, but also about how to open port 80 for Windows 10 (or any other), if the need arises.

№	Purpose
21	Required for working with FTP servers. Allows you not only to connect to the server and view data on it, but also to upload/download it.
22	This is an option for the SSH network protocol that is responsible for remote control OS and makes it possible to transfer files between different devices.
23	Helps implement a network text interface aimed at the same external control of the system.
25	The main mail protocol is SMTP, which, as it becomes clear, is needed to transmit messages over the network.
53	It is necessary for the operation of the DNS (Domain Name System), which is actually the tip in creating the name of a specific network IP address.
79	Finger network protocol, which makes it possible to obtain information about all users on a remote computer.
80	Indicates presence virtual server on a specific machine.
110	The POP3 protocol is responsible for transferring messages between mail server and a computer.
111	Sun RPC is a system through which you can call procedures remotely.
119	NNTP – is responsible for communication between members of news groups.
139	NetBIOS is a generally accepted protocol designed for local networks, to which a variety of IBM/PCs are connected and the manufacturer does not at all affect their joint functioning.
443	It’s worth knowing how to open port 443 on Windows 10, since it is responsible for the operation of HTTPS protocol, which is the main one for encrypting modern websites.
513	rLogin protocol and again remote access To UNIX systems, which can be obtained by any users of similar UNIX systems.

Complete list of parameters for creating rules

Finally, there remains a category of ports that should also not be forgotten, but the most reasonable way is to select them from the list given at this link: https://ru.wikipedia.org/wiki/List_TCP_and_UDP_ports. The table shows all possible options and if you need to know, how to open port 25565 on Windows 10, then it immediately becomes clear that we are talking about setting Minecraft games. It also contains all the values ​​for various system functions and most popular installed applications.

Naturally, the settings of all applications and video games are individual, and therefore you should handle the firewall service more carefully. There is a risk that the next created rule will lead to an intrusion into the operating system with subsequent disabling it. Or incorrect configurations will cause some applications and video games to stop functioning.

On the Internet you can find countless articles on the topic of instructions for using the system on a computer or laptop. And specifically on the topic of opening and using a port. Users often encounter a situation where everything seems clear, how to open a port and where to look at it, but when performing these manipulations, for some reason the zone turns out to be inaccessible.

And often the point is not that someone did not understand something. Sometimes the operating system itself can make such jokes. More precisely, the security of your computer. Opening a port on the router is half the battle. But trying to open it with the same success in the rules is quite difficult. Read how to open ports on Windows 10 in detail in the article below. Learn how to find out open ports.

Checking the port (open, closed).

There are several ways to check the port. The simplest are checks through online services. There are many sites to choose from where you can do this easily and for free.

You can also check through the device system itself. To do this you need to follow this simple path:

• computer;
• remove or change the program.

This is what such a chain will look like on the device.

And in the window that opens, you need to select the following items and put special checkmarks on them:

• "Telnet Client";
• "Telnet server".

You select this in the menu called “Windows components”.
Next you need to open the command line. The command “win+R” can easily help you open it. Then carefully enter cmd into the line that appears.

When you didn’t see such a designation, it means that everything went with a bang. The connection was successfully established if no error occurred. Here's how to view open ports.

Opening the port.

We looked at the openness and, if necessary, you can always open the port yourself.
Learned how to find out all the ports open on your computer. You can proceed to their discovery itself. Using the example of opening in a firewall. In order for you to get into the settings, you can also use several chains of actions for this.

1. Start.
   Control Panel.
   System and safety.
   Firewall.
2. In the search, immediately enter bandwall and transition.
3. The universal method is considered to be a transition using such an influence. “win + R” and enter firewall.cpl there, then click on “Enter”. And the whole process of getting into the setup.

Select “rules for incoming connections”.
The next step is the “create rule” button.

Here we select “for port”.
Set the most commonly used protocol type. This is a protocol type named TCP. And check the box next to “specific local ports”.

Then the penultimate menu item is “allow connection”.
You don’t have to change any other items, now all you have to do is just enter the name and the steps are complete.

Opening in firewall.

You don't always need to agonize over network policy settings. Especially if you know for sure that you have firewall programs installed.

The “trusted applications” function is always available for every defender. In this case, you will just need to go to the settings. Next, go to applications. And there click on the option to add exceptions. This item may also be called the trusted applications item. And just specify the path to the file program. If this does not help, then we next check the operating order of the router.

Opening on the router.

When the action does not start working, all that remains is checking on the router. This happens when the interface on the router differs from the functional settings.

It is worth noting that the examples you read here are suitable for the most common brands. Not necessarily for everyone.

To do this, you need to enter the IP address in the address line. There the router interface will open for you. Enter your data to complete authorization. You then get to the interface and now enter your username and password. The path forward may depend on the model and manufacturer.

The way for asus.

Enter the Internet. Forwarding. And in the column, mark the plus opposite to remove/add. Enter any name. The protocol most often chosen is TCP. But often a program may require the UDP option. Then we will add the program to the antivirus exception.

And all actions are completed. Now you can definitely not only find out on your own whether a port is open or closed, but also independently carry out all the specified manipulations to open this port. You can always watch the video for articles on further action for other models. Just follow the link provided and start watching.