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Firewalls: Test, Test And Test Again!

Have you scheduled regular penetration testing?


Posted by Pritesh Ganatra on 02/04/2024 @ 8:00AM

What do your IT systems, servers, IP telephone systems, network-connected mobile phones, laptops, PCs, Wi-Fi access equipment, IP cameras, Internet-connected temperature and CO2 sensors all have in common these days?

Your firewall is an incredibly important device that protects your business networks!

Your firewall is an incredibly important device that protects your business networks!

copyright: olegdudko / 123rf

Well, I gave you a small clue when I wrote the phrase 'internet-connected'. All of these, and hundreds of more devices, operate via an internet connection and for businesses, I have three words for you.

"Firstly: Firewalls! Secondly: Penetration Testing!"

Let's talk about firewalls then. I am not talking about Windows Security either. I am talking about a centralised hardware/software/licenced network security device that allows all of the aforementioned devices that connect to your network to be guarded against any possible cyber attacks.

Hackers constantly bombard your network to see where the gaps are in your defences and whether the firewall has been configured to cover every eventuality. Not only should your individual devices require passwords to be changed, but you should also close and lock down ports and firewall permissions. This also needs to be reviewed regularly to ensure as many loopholes are closed as possible.

This is where the second part of the regular penetration testing comes into play. As mentioned in previous blog posts, there are times when new equipment is added or swapped out and the relevant changes required to firewall settings may be overlooked if your IT department were not aware that, for example, the air condition unit is now a 'connected device' and the technician has simply plugged into a spare port with no configuration on the firewall for that particular device.

Quarterly penetration testing would identify these gaps in your defences as hackers could use the IP address of the Aircon unit to hop over to the server networks of your business!

Firewalls come in all shapes, sizes and complexities to match your business. There are many variants to match your budget and with a word of caution, I say don't let price be the deciding factor.

The moral of the story is that you should always involve your in-house or external (outsourced) IT professionals and let them know anytime you add or change devices, especially smart speakers and video doorbells that are seemingly DIY.

Customer data on your network is your responsibility so the more you apply security and testing to your network, the better chance you have of blocking an attack.

Until next time ...



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If anything I've written in this blog post resonates with you and you'd like to discover more, it may be a great idea to give me a call on 01604 926100 or take a look at my website which you can find by clicking here.

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About Pritesh Ganatra ...


The word 'Technology' has too many connotations in today's world!

Where do we start? Simple terms like 'IT' and 'Telecoms'? or terms that appear NOT to have an actual meaning at all!, e.g. 'Internet of Things (IoT).

Technology also encompasses specialist products and services like 'Rugged' and 'Tough' android devices, Lone Worker Software, panic alarm devices, smart energy devices, low energy lighting, credit card terminal (PCI DSS) security, indoor/ outdoor Wi-Fi systems, Ultrafast Gigabit internet connectivity, access control systems, industrial IoT circuit controllers.

BTS UK can consult from simple solutions to the most complex, provide some of the products through a wholesale channel, bring together a multi-disciplined 'Task Force' to deliver and implement complete Technology 'projects'.

I am your technology problem solver and I look forward to helping you.


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