What is a firewall?
A firewall is a piece of software or hardware device used to keep computers secure when accessing the internet. Not only does a firewall block unwanted traffic, it also helps block malicious software and worms from infecting a computer.
Basically, firewalls are like the front desk security guard, who verifies every person going in or out of the building, regardless of whether they are an employee or a guest. Suspicious individuals are refused entry to the portion of the building beyond the security desk.
How do firewalls work?
Firewalls are programmed with specific pre-established rules, which they compare all ingoing and outgoing packets against. This helps filter out suspicious traffic and prevent cybersecurity attacks. Firewalls guard each entry point to the network so that unauthorised individuals can’t gain access to the network.
Why are firewalls important?
Firewalls play a vital role in your network’s defence systems. Not only can they help keep unauthorised users out, preventing cybersecurity attacks, but they can also be used to segment your network and limit access to sensitive areas on the network to individuals who genuinely require access. This helps prevent employees from inadvertently exposing critical systems or confidential information and compromising the overall security of your network.
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