Just as a firewall in a building attempts to prevent a fire from spreading, a computer firewall attempts to prevent computer viruses from spreading to your computer and to prevent unauthorized users from accessing your computer. A firewall exists between your computer and the network. It determines which services on your computer remote users on the network can access. A properly configured firewall can greatly increase the security of your system. It is recommended that you configure a firewall for any Red Hat Enterprise Linux system with an Internet connection.
He is having 20+ years of experience in IT with expertise in Networking, Security, Data Center, Virtualization, and HCI. He has handled major ICT projects across the Middle East region covering UAE, Qatar, and Kuwait and also trained hundreds of students around the globe in the Network Security domain from basic level to expert level.