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開啟 Windows 安全性設定. 選取網路設定檔: [網域網路] 、 [私人網路], 或 [公用網路] 。 在 Microsoft Defender [防火牆] 下, 將設定切換為 [開啟] 。 如果裝置已連線到網路，則網路原則設定可能會讓您無法完成這些步驟。 如需詳細資訊，請連絡您的系統管理員。 若要關閉，請將設定切換為 [關閉]。 關閉 Microsoft Defender 防火牆可能會讓您的裝置 (以及網路，如果有的話) 更容易受到未經授權存取的攻擊。 如果需要使用的應用程式遭到封鎖，您可以允許應用程式通過防火牆，而不是關閉防火牆。 注意： 如果您收到錯誤訊息，或如果您的設定無法開啟，您可以 使用疑難排解員 ，然後再試一次。 什麼是防火牆？
開啟 Windows 安全性設定. 選取網路設定檔: [網域網路] 、 [私人網路], 或 [公用網路] 。 在 Microsoft Defender [防火牆] 下, 將設定切換為 [開啟] 。 如果裝置已連線到網路，則網路原則設定可能會讓您無法完成這些步驟。 如需詳細資訊，請連絡您的系統管理員。 若要關閉，請將設定切換為 [關閉]。 關閉 Microsoft Defender 防火牆可能會讓您的裝置 (以及網路，如果有的話) 更容易受到未經授權存取的攻擊。 如果需要使用的應用程式遭到封鎖，您可以允許應用程式通過防火牆，而不是關閉防火牆。 注意： 如果您收到錯誤訊息，或如果您的設定無法開啟，您可以 使用疑難排解員 ，然後再試一次。 什麼是防火牆？
- Overview
- Find the Windows 7 Firewall
- The Main Firewall Display
- Danger! Firewall Off
- Block New Programs
- Restore Default Settings
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The best thing Microsoft ever did for security was turn on the firewall by default way back in the days of Windows XP, Service Pack (SP) 2. A firewall is a program that restricts access to (and from) your computer. It makes your computer much safer, and should never be turned off for any computer connected to the Internet. Before XP SP2, the Windows firewall was turned off by default, meaning users had to know it was there, and turn it on themselves, or be left unprotected. Needless to say, many people failed to turn on their firewall and had their computers compromised.
The firewall in Windows 7 isn't much different, technically than the one in XP. And it's just as important to use. As with all later versions, it's on by default and should be left that way. But there may be times it has to be temporarily disabled, or for some other reason gets turned off. That means learning how to use it is important, and that's where this tutorial comes in.
To find the firewall, left-click on, in sequence, Start/Control Panel/System and Security. That will bring you to the window shown here. Left-click on "Windows Firewall," outlined here in red.
The main screen for Windows Firewall should look like this, with the green shield and white checkmark for both "Home" and "Public" networks. We're concerned here with Home networks; if you're on a public network, chances are very good that the firewall is controlled by someone else, and you won't have to worry about it.
If instead, those shields are red with a white "X" in them, that's bad. It means your firewall is off, and you should turn it on immediately. There are two ways to do this, both outlined in red. Clicking "Use recommended settings" to the right turns on all your firewall settings automatically. The other, to the left, says "Turn Windows Firewall on ...
Clicking "Turn Windows Firewall on or off" in the previous screen brings you here. If you click on "Turn on Windows Firewall" in the circles (you may also hear them called "radio buttons"), you may notice that the box "Notify me when Windows Firewall blocks a new program" is automatically checked.
It's a good idea to leave this checked, as a security measure. For example, you may have a virus, spyware or other malicious program try to load itself on your computer. This way, you can keep the program from loading. It's a good idea to block any program you have not just loaded from a disc or downloaded from the Internet. In other words, if you didn't initiate the installation of the program in question yourself, block it, because it's likely to be dangerous.
The final item in the main Windows Firewall menu you need to know is the "Restore defaults" link on the left. It brings up the screen here, which turns the firewall back on with the default settings. If you've made changes to your firewall over time and don't like the way it's working, this puts everything right again.
The Windows Firewall is a powerful security tool and one you should use at all times. If connected to the Internet, your computer could be compromised in minutes, or even less, if the firewall is disabled or otherwise turned off. If you get a warning that it's off, take immediate action -- and I do mean immediate -- to get it working again.
2023年10月4日 · 2023/10/04. Windows 防火牆（在較新版本的 Windows 中也稱為 Windows Defender 防火牆）是一項安全性功能，旨在保護您的電腦免受未經授權的存取和惡意網路活動的侵害。 它還充當電腦與 Internet 或其他網路之間的屏障，可讓您控制哪些程式或服務可以透過網路進行通訊。 本教學介紹如何使用 Windows 防火牆、設定它以增強安全性以及恢復其預設設定。 如何啟用或停用 Windows 防火牆. 預設情況下，你的電腦上啟用 Microsoft Defender 防火牆。 它是 Windows 安全應用程式的一個元件，提供附加功能，例如防毒保護、應用程式和瀏覽器控制、帳戶保護等。
Windows 安全性 中的防火牆 & 網路保護可讓您檢視 Microsoft Defender 防火牆的狀態，並查看您的裝置已連線到哪些網路。 您可以開啟或關閉 Microsoft Defender 防火牆，並存取下列網路類型的進階 Microsoft Defender 防火牆選項： 網域 (工作場所) 網路. 私人 (信任的) 網路. 公用 (不受信任的) 網路. 如果您想要變更設定，請選取您要變更的網路類型。 「私人」網路與「公用」網路之間的差異為何？ 網路設定. 當您選取三種網路類型的其中一種時，您會看到該類型的設定頁面。 在此 Windows 安全性 會告訴您目前連線的類型網路，如果有的話。 通常您的電腦一次只會連線到一個網路。
2024年3月19日 · Windows 防火牆是一項安全性功能，可藉由篩選進入和離開裝置的網路流量，協助保護您的裝置。 此流量可以根據數個準則進行篩選，包括來源和目的地IP位址、IP通訊協定或來源和目的地埠號碼。 Windows 防火牆可以設定為根據您裝置上安裝的服務和應用程式來封鎖或允許網路流量。 這可讓您僅將網路流量限制為明確允許在網路上通訊的應用程式和服務。 Windows 防火牆是主機型防火牆，隨附於操作系統，且預設會在所有 Windows 版本上啟用。 Windows 防火牆支援因特網通訊協定安全性 (IPsec) ，您可以用來要求任何嘗試與裝置通訊的裝置進行驗證。 需要驗證時，無法驗證為 受信任裝置的裝置 無法與您的裝置通訊。
2023年11月21日 · Windows Firewall is a host-based firewall that is included with the operating system and enabled by default on all Windows editions. Windows Firewall supports Internet Protocol security (IPsec), which you can use to require authentication from any device that is
