The role of Firewalls

Network security has never been more critical than it is in the current climate.  With remote working and the cyber criminals looking to gain access into networks, it’s never been more important to safeguard your digital assets as best you can.

One element of network security is firewalls, which is what today’s blog will be about, we will be talking firewalls and providing you with an introduction…

What is a firewall?

Firewalls are important devices that assist in your network security.

They are responsible for monitoring all your internal and external traffic coming into and going out of your network and will either allow or deny traffic, based upon a defined set of rules.

The purpose of a firewall is to differentiate between your internal and external traffic and your firewall will block any traffic that it deems to be potentially malicious and could cause harm to your network or gain access to your business data.

What is the role of firewalls?

The role of firewalls, as discussed above is to allow or deny traffic to enter your network, the way in which this works is due to firewalls working alongside a predefined set of rules.

These rules are then responsible for filtering any traffic that it deems to be suspicious at your computer’s ports (this is the place where traffic enters your network) and exchanges information with any devices.

Why do I need a firewall?

Firewalls are extremely important, as without them you don’t know what traffic is gaining access into your network.

Not all traffic is malicious.  But it is important that all traffic is scrutinised to protect your network and to reduce the risk of attack from a malicious source that could potentially discover it.

Talk to Data Installation & Supplies today if you would like to discuss the role of firewalls in more detail with our security experts.

If you would like to discuss any of our network security solutions please contact us on 01274 869 099 or


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