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What does a firewall do?Ī firewall acts as a gatekeeper. The topics below can help you learn what firewalls do and determine the level of protection that will help keep your computer and the data on it safe and secure. The key is determining how much protection you need. Not only does a firewall block unwanted traffic, it can also help block malicious software from infecting your computer.įirewalls can provide different levels of protection. If you are connected to the Internet, it is highly recommended that you position your computer behind a firewall to avoid it being compromised by an attacker.įor more information regarding firewalls or any other networking/technology needs, you can reach out to any of our techs at SandStorm IT at 90.A firewall is a security device - computer hardware or software - that can help protect your network by filtering traffic and blocking outsiders from gaining unauthorized access to the private data on your computer. They are essential for preventing intrusions into your private network and the PCs connected to it. In summary, firewalls are used to protect your computer while you are connected to the Internet. Firewalls are an absolutely essential line of defense for your computer on the Internet. If an attacker is able to make connections to any one of your applications, he or she could potentially compromise your computer if there exists a security vulnerability in the application. Without firewalls, any applications you have running on your computer that accepts network connections could be connected to by anyone on the Internet. This is why they are so crucial to safe web surfing.

Why do I need one?įirewalls generally do not allow connections inside the network that are initiated from outside the network unless you give them permission. However, if it sees that you are trying to initiate a connection to a website, it will forward that data along to the router where it will eventually reach the targeted website. For example, if the firewall sees a stream of data in which a random computer on the Internet is trying to connect to a computer inside of your network, it will discard the data and may also warn you about the attempted connection. Firewalls analyze the data, and then throw it out if it looks malicious or forward it to the network if it looks benign.

When data is sent over the Internet, it comes packaged with information about where it is coming from and where it is supposed to go, as well as an indication as to what application the data is for. Firewalls are hardware and/or software systems which protect end users from malicious traffic on the Internet.