In these days of elevated numbers of cyber threats and cybercrimes, it has become extremely important to use a firewall on your computer. Whenever your computer is connected to the Internet or even any other network, it is prone to attacks through unauthorized access. Therefore, your Windows computer has a built-in security system, known as Windowsファイアウォール, in order to protect you against any unauthorized access of your computer by filtering out any unwanted or harmful information entering your system and blocking potentially harmful apps. Windows allows its own apps through a firewall by default. This means that the firewall has an exception for these particular apps and will allow them to communicate with the Internet.
When you install a new app, the app adds its exception to the firewall in order to access the network. Therefore, Windows asks you if it is safe to do so through the ‘Windows Security Alert’ prompt.
However, sometimes you need to add an exception to the firewall manually in case it hasn’t been done automatically. You might also need to do so for apps that you had denied such permissions previously. Similarly, you may want to remove an exception from the firewall manually in order to prevent an app from accessing the Internet. In this article, we will discuss how to block or allow apps through the Windows Firewall.
Windows 10: Allow or Block Apps through Firewall
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Method 1: How to Allow Apps in Windows 10 Firewall
To manually allow a trusted app through the firewall using settings:
1.Clickをクリック 歯車のアイコン in the Start menu or press Windows Key + I to open Window Settings.
2.「」をクリックしますネットワークとインターネット'。
3.Switch to the ‘Status:' タブ。
4.Under ‘ネットワーク設定を変更する’ section, click on ‘Windowsファイアウォール'。
5.The ‘Windows Defenderセキュリティセンター’ window will open.
6.Switch to the ‘ファイアウォールとネットワーク保護' タブ。
7.「」をクリックしますファイアウォール経由のアプリを許可する’. The ‘許可されたアプリ’ window will open.
8.If you can’t reach this window, or if you are also using some other firewall, then you can open the ‘Windows Defenderファイアウォール’ window directly using the search field on your taskbar and then をクリックしてください 'Windows Defenderファイアウォールを介したアプリまたは機能を許可する'。
9.Click on the ‘設定を変更する’ button in the new window.
10.Find the app that you want to allow on the list.
11.Check the relevant チェックボックス against the app. Choose ‘プライベート' に allow the app to access a private home or work network. を選択してください '公共' に allow the app access to a public network.
12.If you can’t find your app in the list, click on ‘別のアプリを許可する…’. Further, click on the ‘ブラウズ’ button and browse the app you want. Click on the ‘Add'ボタンをクリックします。
13.「」をクリックしますOK’ to confirm settings.
To allow a trusted app through the firewall using the command prompt,
1.In the search field located on your taskbar, type cmd。
2.を押します Ctrl + Shift + Enter to open an elevated command prompt.
3.Now type the following command in the window and press Enter:
netsh advfirewall firewall add rule name="アプリ名" dir=in action=allow program="app_path/app.exe" enable=yes
注: Replace the app name and path with the relevant one.
Method 2: How to Block Apps in Windows 10 Firewall
To block an app in Windows Firewall using settings,
1.Open the ‘Windows ディフェンダー セキュリティ センター’ window by following the same steps as we did above in order to allow an app through the firewall.
2.In the ‘ファイアウォールとネットワーク保護’ tab, click on ‘Apply an app through firewall'。
3.「」をクリックします[設定の変更]'。
4.Find the app you need to block in the list & uncheck the checkboxes against it.
5.You can also completely remove the app from the list by selecting the app and clicking on the ‘削除します'ボタンをクリックします。
6.Click on the ‘OK’ button to confirm.
To remove an app in firewall using the command prompt,
1.In the search field located on your taskbar, type cmd。
2.を押します Ctrl + Shift + Enter to open an elevated command prompt.
3.Now type the following command in the window and press Enter:
netsh advfirewall firewall add rule name="アプリ名" dir=in action=block program="app_path/app.exe" enable=yes
注: Replace the app name and path with the relevant one.
推奨:
Using the above methods you can easily Allow or Block Apps in Windows Firewall. Alternatively, you can also use a third-party app like ワンクリック ファイアウォール to do the same even more easily.