In this guide I will explain everything you need to know to configure the Windows firewall correctly.
In this guide, I’ll explain everything you need to know to configure the Windows firewall correctly so that all your applications work. I’ll also briefly explain what it is, what it’s used for, and what its exact functions are. If you want to learn how to use this security tool, don’t hesitate: stay with me for this complete guide.
Also, remember that you can visit the comments section . There you’ll be able to leave your opinion, explain what settings you use, and mention any relevant information not mentioned here. When you participate in our community, you make our articles better.
Table of Contents
What is the purpose of configuring the Windows firewall?
The Windows Firewall is a system-integrated security tool that controls network traffic entering and exiting your computer . Its main function is to protect the system by blocking unauthorized connections, especially those coming from outside. At the same time, it allows secure applications to connect to the Internet normally.
When the firewall is enabled, it acts as a filter that monitors the connections each application attempts to establish. If it detects that a program is untrusted or doesn’t have the proper permissions, it can prevent it from accessing the network, either to send or receive data.
From the Windows Firewall settings, you can check which applications are allowed to communicate over the network and modify these permissions if necessary. If you install a new program and it isn’t working properly, one of the first things I recommend checking is whether the firewall is blocking its access.
If an application is not allowed in Windows Firewall, does that mean it can’t connect to the Internet?
When an application is allowed in the Windows firewall, it means that it has explicit rules that allow it to accept incoming connections , that is, from other computers to yours.
If the application appears as not allowed , this is what normally happens with its connections:
- Outgoing connections . By default, these are allowed in the Windows Firewall. This means that an app can continue to function normally if it only needs to connect to remote servers.
- Incoming connections . If an app needs to receive incoming connections, for example, a web server, remote control software, or P2P file sharing software, it will fail if it’s not allowed by the firewall.
To better understand this, consider these two examples. On the one hand, we have web browsers , like Chrome, which, even if they’re not on the whitelist, will function seemingly normally. This is because they essentially work with outgoing connections. However, P2P sharing software, like eMule , requires permission from the Windows Defender Firewall to operate.
Configure the Windows Firewall, step by step
Below, I’ll show you the options you have in the Control Panel to configure the Windows Firewall. I’ll also show you how to access them.
Access settings
To access the Windows firewall settings, it’s best to use the system search . To do this, press the Windows key and type “Windows Firewall.”
In the results, you’ll see an entry that says “Windows Defender Firewall.” Click on it to go directly to the settings. As a curiosity, all the settings for this tool are still in the Control Panel .
Turn the Windows Firewall on or off
Once you’re in the Windows Firewall settings, the first thing you’ll be able to do is enable or disable this protection. Generally, you don’t need to do any of this, as Windows is responsible for identifying trusted applications and allowing them to connect to the network without being blocked by the firewall.
However, you may occasionally experience issues with the firewall, especially with lesser-known software. To decide whether to turn the firewall on, simply click the Turn Windows Defender Firewall on or off option .
You’ll then be able to decide how this protection behaves depending on the type of network you’re connected to. A private network is not the same as a public one, and the firewall may behave differently in each case.
In this sense, it’s crucial that you label your networks correctly. For example, while writing this article, I noticed that my home network is set to public on my PC. To change this, go to Settings > Network & Internet > Wi-Fi > Network Name . There, select whether it’s a public or private network. By default, the first option is used.
Add exceptions to the firewall
As I mentioned above, the system normally creates the appropriate exceptions for trusted applications . For example, if you install Google Chrome, Windows will create the necessary exceptions so that all the browser’s features work correctly.
However, if that doesn’t happen, you’re likely experiencing issues with specific features. In these cases, it’s best to check the Allow apps to communicate through Windows Defender Firewall section .
Then, tap Change settings . From that point, you’ll be able to add allowed apps, deciding whether they’ll be available on public or private networks.
You also have the option to Remove Apps. Alternatively, if you tap Details, you’ll be able to see more information about the program in question, although many of them don’t have a clear description.
And you, what do you think about the protection provided by the Windows Firewall? Leave your opinion below.
