A firewall is built into the Windows Operating System to protect you against threats. We’ll look at the Windows Firewall and some of its sophisticated capabilities in this article. These days, when you hear “firewall,” you’re really talking about a stateful firewall.
A stateful firewall is one that recognizes and remembers the state of the traffic it processes. If traffic has sent outbound, the firewall will automatically allow the identical traffic to return inward.
Similarly, if someone tries to transmit traffic over this firewall without first establishing a state or traffic flow, the firewall will immediately block it. We have a client that will be talking with a web server and through a firewall.
The firewall has already set to allow this outgoing traffic into the web server. The response to this request will send back to the client by the web server.
Because a prior session had previously established between the client and the web server, the firewall recognized that state and allowed traffic to continue to the client. If someone else on the internet tried to send traffic to the client through that firewall, but there was no existing state or rule that would allow it, the firewall would stop it and the traffic would never reach the client on the inside. Windows Defender Firewall has replaced the Windows Firewall in Windows 7 and Windows 8, however it is essentially the same tool with the same functionality.
The firewall has built into the operating system. The configuration options are find in the Control Panel under Windows Firewall or Windows Defender Firewall. There are also Advanced Settings options within the Firewall that allow you to make extra setup changes.
On the left sidebar, you’ll see it listed. The Windows Firewall’s basic feature allows apps to send and receive traffic. This is especially handy if the application anticipates any network traffic.
An application, such as a Voice over IP communications tool, may require you to allow both inbound and outbound traffic to your computer.
The Allowed Apps option in Windows Firewall is one approach to accept or restrict this traffic.
This list of permitted apps and features includes the installed programs. And depending on the network profile in use, you can enable or restrict communication for that app.
At this level, your sole options are to enable all traffic for a certain app or none of the traffic for a specific app. You can’t change any of the settings. For example, you can’t provide a scope for the traffic, which means it will be both inbound and outbound.
You can’t set up connection security rules that direct Windows to transport this traffic through a secure IP Sec tunnel alone. Those parameters are, of course, configurable in the Advanced Security section. However, if all you want to do is enable or disable a specific application. This is a really simple way to accomplish so. I’m now connected to a public or guest network. Incoming connections to applications that are not on the list of approved apps will banned, according to Windows Defender Firewall.
By tapping “Allow an app or feature through the Windows Defender Firewall,” I can edit the apps that are authorized. Then it will display a list of all of the applications I’ve installed. If you wish to disable certain features, for example, scroll down to Skype.
I may also enable or disable Skype by unchecking those boxes for the Private and Public profiles. Inbound traffic will no longer be able to communicate with the Skype app.
Use the Windows Firewall with Advanced Security features if you want detailed control over all traffic inbound and outbound from your machine. This allows you to set up encryption rules for inbound, outbound, and connection security.
You can also create granular rules that allow you to specify the application, the port number, any predefined services, and custom variables. Options such as protocol import information, the scope of the particular rule, any actions you’d like to have. And the profile that will included for this rule are all available as custom variables.
The advanced functions accessible through the Firewall’s Advanced Settings menu.
This will open a new window where you may specify inbound and outbound rules, as well as connection security rules and monitoring data. Here are the inbound rules on this PC, for example. I’ll enlarge this so you can see all of the different inbound rules that have set up. You can change the configuration of any of these rules by just clicking on them and changing the rule itself.
This is especially important if you want to enable or stop a portion of an application’s communication or if you want additional control over what traffic has allowed inbound and outbound from your computer.