In the event that someone breaks into your network and accesses client’s data you are legally liable to your clients for this breach. A firewall is the first line of defense in preventing malicious access to your network. There are any industries and professional organization that require you protect your network and data with a firewall.
In a computer network, a firewall’s primary task is to prevent unauthorized connections and viruses from entering your network. If an outside network, user, or program wants to access your computer, it sends a request. If you have a firewall, the firewall evaluates the request, compares it to a list of authorized connectors, and takes an action based on the status of the request and the firewall’s specific programming.