Use a firewall as a gatekeeper between your computer and the Internet

A firewall is a piece of software or hardware that filters all Internet traffic between your computer and the Internet. It works to either block or permit Internet traffic to and from your computer. You can use the firewall to better protect your computer from intrusion by offensive websites, spam and unauthenticated logins from potential hackers.A firewall is essential for those that use their computers to browse the Internet.