For the purpose of firewalls, a port is an artificial construct created by the operating system to represent a pathway for a specific type of data. In the world of firewalls, the term port doesn’t refer to a physical connection like a USB, VGA, or HDMI port. PortsĪ firewall is able to manage this traffic by monitoring network ports. In reality, a firewall is just a piece of software controlling incoming and outgoing network traffic. If you understand firewalls, you can keep your network secure by making intelligent choices about the traffic you allow in and out.īecause "firewall" is such an exciting name, people often imagine an intricate Tron-style neon battle happening on the outskirts of a network, with packets of rogue data being set alight to protect your users’ the techno fortress. Linux system administration skills assessmentįirewalls are a vital part of network security, so it’s important for a sysadmin to be familiar with how they work. A guide to installing applications on Linux.Download RHEL 9 at no charge through the Red Hat Developer program.
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