Windows server 2019 firewall — Ваш верный помощник с OS Windows

Многие программы, которые устанавливаются на виртуальный сервер, и работают через сетевые протоколы, могут использовать не стандартные порты для обмена пакетами. Брандмауэр по умолчанию будет блокировать запросы от подобных программ. К примеру, это могут быть игровые серверы, или бухгалтерские программы.

Если же подобные программы выдают ошибку из-за закрытого порта, то его можно открыть используя оснастку Windows Firewall. В операционной системе Windows 2012 кликаем правой кнопкой мышки на Start и из контекстного меню выбираем Control Panel Переходим в System and Security далее Windows Firewall.
Или же, для версий ОС Windows 2016 и 2019, можно воспользоваться комбинацией клавиш Win+R и в окне Open прописать команду firewall.cpl.

В появившемся окне, с левой стороны, нажимаем на Advanced Settings и переходим к добавлению правил.

В новом окне, с левой стороны, выбираем вкладку Inbound Rules после этого в правой части окна, в колонке Actions выберем пункт New Rule…

После этого в появившимся окне New Inbound Rule Wizard, в пункте Rule Type, выбираем значение Port, и нажимаем Next.

После этого нужно указать нужный нам протокол, и нужный нам порт. В нашем случае это TCP и порт 40000. И нажимаем Next.

В следующем окне выберем Allow the connection и нажмем Next.

В пункте Profile отмечаем нужные профили брандмауэра и нажимаем Next.

В последнем окне Name, вводим имя и если нужно описание для данного правила, и жмем Finish.

Теперь необходимо таким же образом добавить UDP. С левой стороны, выбираем вкладку Inbound Rules после этого в правой части окна, в колонке Actions выберем пункт New Rule… И так далее по инструкции.

Если Вам будет необходимо добавить диапазон портов, то их можно добавить через тире.
Например: 40000-41000

Теперь мы можем наблюдать добавленные правила в списке правил для входящих подключений.

После запуска приложения, которое использует те порты, что были добавлены Вами, должно запуститься без ошибок.

Так же для этого можно использовать Power Shell и потратить менее времени.

К примеру можем использовать тот же 40000 порт.
Для протокола TCP:

netsh advfirewall firewall add rule name="New-Port" protocol=TCP localport=40000 action=allow dir=IN;

Для протокола UDP:

netsh advfirewall firewall add rule name="New-Port" protocol=UDP localport=40000 action=allow dir=IN;

По такой же аналогии можно открывать необходимые порты.

Источник

Windows Server 2019 contains a firewall program called Windows Defender Firewall with Advanced Security. The firewall filters incoming and outgoing traffic on your Windows Server 2019 instance to safeguard it from common network attacks. By default, the firewall is configured to allow access to all pre-installed system programs.

However, several programs may use multiple different ports for operation, and these will be automatically blocked because they don’t match with the rules in your firewall configuration. In this case, you need to open the specific port on Windows Server.

Prerequisites

Deploy a Windows Server 2019 Instance on Vultr
A Remote Desktop Connection App

Establish a connection to your server by logging in through any remote desktop app or click the console on your Vultr dashboard to access your server. After you connect you can start configuring your Windows server 2019 firewall rules.

Turn Windows Firewall ON

By default, Windows Defender Firewall is turned on, but in any case, you should confirm the current status and turn on firewall. To do this, click the tools node under server manager and select Windows Defender Firewall with Advanced Security from the drop down list.

From the open group policy management window, check the current status of Windows Firewall profiles if it is set to ON; otherwise, click the Windows Defender Firewall properties option and turn the service on per profile.

Firewall Rules

Windows Firewall rules allow you to either permit or block specific incoming and outgoing network packets on your server. You can choose multiple parameters for each inbound or outbound rule. A rule can consist of a TCP or UDP port, program name, service, or a protocol to filter for every server profile.

Windows server profiles are grouped into, Domain, Private and Public. Domain represents your server’s connection to a corporate domain network, Private applies to your home or workplace network connection, and Public represents non-secure public network locations.

Open an Inbound Port (Incoming connections)

Launch windows defender firewall from the tools sub-menu under server manager. Then, select Inbound Rules on the left panel of the Firewall console.

A list of current rules will be displayed. Now, on the left Inbound Rules sub-menu under actions, click New Rule.

Select Port as the rule type in the rule wizard and click Next.

Now, choose whether the new rule applies to a TCP or UDP port on your server. Then, select specific ports and enter your target port number, you can enter a ports range, or multiple ports separated by - and , respectively, then click Next.

Define your TCP or UDP port rule.

Allow the connection will allow incoming connections to the specified server port
Allow the connection if it is secure will authenticate with IP security and either deny or allow the connection. For example, https connections will be allowed and http blocked.
Block the connection will block all incoming connections to your server through the specified port

In this case, choose Allow the connection to open the port.

Click Next to assign the new rule to one or more profiles. You can select between Domain, Private, and Public, or choose all to apply the firewall rule on multiple profiles.

Next, give your new firewall rule a custom name and description for easy identification. Then, Click finish to enable the new rule. Your new Inbound (Incoming) port rule will be enabled, and all connections to the server that match the port will be accepted.

Open an Outbound Port (Outgoing connection)

From the Windows Defender Firewall console, click Outbound Rules on the left pane, and a list of available outgoing connection rules will be displayed.

Now, click New Rule on the right pane under the outbound rules node.

In the new outbound rule wizard, select Port as the rule type and click Next.

Now, let’s choose whether the new rule applies to a TCP or UDP port. Then, select specific remote ports and enter the target server port number; you can enter a range of ports, a single port, or multiple different ports you intend to open.

Next, on the Action page, select Allow the connection, then click next to select the server profile on which the rule should be enabled.

Give the new outbound rule a name and description that uniquely describes it. Then, click Finish to enable the outbound rule for the target port to be open on all selected server profiles.

Open a Port through Windows PowerShell

From the Windows start menu, open PowerShell. Then, edit the following command and replace it with your settings.

New-NetFirewallRule  -Enabled:True  -LocalPort 21  -Protocol TCP  -Direction Inbound  -Profile Domain  -Action Allow  -DisplayName example opening a port rule"

New-NetFirewallRule Creates a new Firewall rule.
Enabled This enables the new rule, by default, it will be set to True.
LocalPort Your target port number.
Protocol Specifies the protocol associated with your port number.
Direction Sets your target direction to either Inbound (Incoming) or Outbound (Outgoing).
Profile Assigns the new rule to a server profile; you can choose domain, private, or public.
Action defines the state for the new firewall rule, enter allow.
DisplayName sets a custom name for the new firewall rule

Your Output should be similar to the one below.

PS C:\Users\Administrator> New-NetFirewallRule  -Enabled:True  -LocalPort 21  -Protocol TCP  -Direction Inbound  -Profile Domain  -Action Allow  -DisplayName "example opening a port rule"


Name                  : {427a1b12-ece6-4d54-847d-de482b227c6c}
DisplayName           : example opening a port rule
Description           :
DisplayGroup          :
Group                 :
Enabled               : True
Profile               : Domain
Platform              : {}
Direction             : Inbound
Action                : Allow
EdgeTraversalPolicy   : Block
LooseSourceMapping    : False
LocalOnlyMapping      : False
Owner                 :
PrimaryStatus         : OK
Status                : The rule was parsed successfully from the store. (65536)
EnforcementStatus     : NotApplicable
PolicyStoreSource     : PersistentStore
PolicyStoreSourceType : Local

Congratulations, you just opened a network port on your Windows Server 2019. The server will accept incoming and outgoing connections through the selected ports, but the firewall will block connections from a profile that doesn’t match the port rule.

Источник

Firewall is an integral part of any system and can be used to protect a server against unauthenticated access from the outside world. It helps to prevent hackers from logging into servers on the network. Firewall can also be used to set up specific rules in-order to restrict access to specific ports of the system based on IP address.

The basic functionality of a firewall is to control the incoming and outgoing traffic and choose whether to block a particular connection or let it through based on the defined set of security rules.

We can use the below steps for managing Windows firewall settings.

Log in to the Windows server and open Firewall using any of the command firewall.cpl or Windows Firewall using Search bar.

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Under firewall settings, there are two sections called «Private networks» and «Guest or public networks» with green shields to the left of them, which say that the firewall is active. If they are on red shields, then the firewall is disabled.
Click on either of these sections, it will prompt a drop-down menu with details about the current public or private networks.

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Select the Advanced Settings option from the left of the main menu, then you can manage and change the firewall’s advanced settings menu.

Inbound Rules : Which incoming connections are automatically allowed.
Outbound Rules : Which outgoing connections are automatically allowed.
Connection Security Rules : Baselines for which connections your computer will allow and which ones it will block.
Monitoring : This is an overview of your firewall’s basic monitoring guidelines.

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How to Open/Limit a Port in Windows Firewall

Go to Control Panel, System and Security and Windows Firewall.

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Select Advanced settings and highlight Inbound Rules in the left pane.

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Right-click Inbound Rules and select New Rule.
Add the port you need to open and click Next.

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Select the protocol (TCP or UDP) and add the port number and click Next.

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Select Type of connection as per your need in the next window and click Next.

Open Port: Select Allow the connection to open a Port.
Block Port: Select Block the connection to block a Port.

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Select the network type and click Next.

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Name the rule something relates to the setting and click Finish.

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How to Allow/Limit the Network in Windows Firewall

Go to Control Panel, System and Security and Windows Firewall.

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Select Advanced settings and highlight Inbound Rules in the left pane.

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Right-click the rule you want to configure, and then choose Properties.

Here you may need to select the Rule wisely as below:

Allow Particular Network : Create a Firewall rule to Allow a port and use that rule’s properties to edit scope.
Block Particular Network : Create a Firewall rule to Block a port and use that rule’s properties to edit scope.

Click the Scope tab. In the Remote IP Address group, select These IP Addresses.

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Select one of the following two options, and then click OK.

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a. This IP Address or Subnet Type an IP address (such as 192.168.0.12) or a subnet using Classless Inter-Domain Routing (CIDR) notation (such as 192.168.0.0/24) that should be allowed for the firewall rule.

b. This IP Address Range Using the From and To boxes, type the first and last IP address that should be allowed to use the firewall rule and then click OK.

Related Feature on LayerPanel

Firewall Overview

How to open the firewall port using the advanced settings.

In the first place it is necessary to enter the Control Panel and follow the next path:

System and security
Windows Defender Firewall
Advanced Settings

Please enter the advanced settings.

The advanced settings of the Windows Firewall are immediately displayed. There are the entry and exit rules plus the security rules for connections. Finally, there are the firewall supervision options.

Advanced Windows Server Firewall Settings

Clicking on the input rules will display the pre-configured Windows Server rules. As the name implies, they are related to incoming network connections and packets. Also, some rules are not activated by default. Therefore, you just need to double-click on them and then enable them.

Enabling a rule within the inbound rules.

Creating a new rule in the Windows Server Firewall.

By right-clicking on inboud rules, you can create a new rule.

Creating a new inbound rule.

There are several options for the creation of the rule. However, you should only select Port. Press Next to continue

Please select Port

Now it’s time to set your connection preferences:

TCP: It is a connection-oriented protocol. In other words, its function is to create connections with the aim of sending data flow.
UDP: It is a non connection-oriented protocol. Consequently, its development is based on the exchange of data grams.

On the other hand, it is possible to enable all ports for connection. This is obviously an unsecured option. Or you can configure specific ports.

Setting port connection values.

Now it is time to determine what action the new rule will take:

Allow connection through the port.
Allow connection if secure. That is, allow data to be transmitted only if the connection is authenticated through Ipsec.
Block connection through the port.

Allow the connection

Please select the option corresponding to Allow connection and press Next. Now it is time to determine which profiles the new rule will be applied to.

Please select the connection profiles for the new rule.

Finally, you can assign a name and description to the new rule. This way it is easier to locate it later.

Optionally you can assign a name and description for the new rule.

Back to the previous screen, you can see the new rule created.

Newly created inbound connection rule.

Ultimately we have seen how to open a firewall port in Windows Server 2019/2016. In addition, the tutorial also serves to block a specific port. This way, the administrator can increase the functionality of the Firewall. All right, that’s it for now. Greetings!

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Источник

In this article, we want to teach you How To Open a Firewall Port on Windows Server 2019.

A firewall is a network security device that monitors incoming and outgoing network traffic and permits or blocks data packets based on a set of security rules.

Its purpose is to establish a barrier between your internal network and incoming traffic from external sources (such as the internet) in order to block malicious traffic like viruses and hackers.

Firewalls carefully analyze incoming traffic based on pre-established rules and filter traffic coming from unsecured or suspicious sources to prevent attacks.

Most Internet applications and services have well-known ports on which machines ‘listen’ for communications.

You can follow the steps below to open a Firewall port on your Windows server.

Note: This guide applies to Windows Server 2016 too.

First, you need to open your control panel. Then, follow the path below to open the Advanced settings:

System and security > Windows Defender Firewall > Advanced Settings

Windows server firewall advanced settings

At the Windows Defender Advanced settings window, click on the inbound rules. And, on the top right of the window click on the New Rule to open a firewall port.

Here a New Inbound Rule Wizard will open. You need to check the box next to the port and click on the Next button.

At this point, you need to check the box next to the TCP. And in the specific local ports, enter the desired port that you want to open on your Windows server.