In modern computing, Internet access is no longer a luxury but a necessity. It is hard to imagine running a business without having access to the Internet simply for computer system updates, let alone for all the operational benefits of having instant access to the world. Of course, this is a two way street and once a computer is connected to the Internet, the world can potentially see, share or steal your data. The first line of defense in protecting your network and sensitive customer information from hackers is a firewall which separates your business network from the Internet.
As a firewall in a building is designed to prevent structural fire from crossing a physical barrier and causing damage to an adjacent structure, a computer firewall similarly protects one network segment from another. A firewall is designed to permit authorized communications out of a network or network segment while restricting unauthorized inbound traffic. As a firewall in a building has security doors that allow only authorized people use based on assurances that they are properly shut and secure, a computer firewall allows for access in and/or out through “ports” for authorized processes and/or users. Click here to find out more for PCI-DSS