What is a Next-Generation Firewall?

Before, basic firewalling was situated in the 4th layer of the OSI model. In short, this meant the firewall was able to block or allow traffic based on the source or destination. For example, person X can browse the web, while person Y can’t or only person X can make and RDP connection to an external server.

These days there is more to the web than just web pages and browsers navigating them. We are having more and more different devices accessing the web, but also devices trying to access our network. To be able to provide secure access from and to our network, we need a firewall that understands more than just source, destination, and ports. This is where the Next Generation Firewall (NGFW) comes in, a device that is able to ‘see’ traffic up to layer 7 of the OSI model.

Next generation Firewall

What can a NGFW do for your network security?

Scan encrypted HTTPS traffic

Detect viruses that may be hidden in normal HTTP/HTTPS traffic (and would be allowed by a traditional firewall)

Allow or disallow certain traffic

Categorize the web traffic to decide if it is allowed (block/allow social media, ect... )

Blocking of types of content

Block certain content on a site without blocking the site itself (advertising, plugins, etc...)

Protection against malicious manipulations

Detect manipulations to your internal servers (SQL injection, Adobe Flash vulnerabilities, etc...)

We are already helping them

mainsys-group.jpg
Ter Molst
Maison Marie-Immaculee
Gemeentebestuur Sint-Jans-Molenbeek
speos Belgium
Vandewiele
iscal-sugar.jpg
TCM

Want more information or a quote? Contact us!

Recent articles

Introducing Our New Cybersecurity Partner: Abnormal AI
Easi
Mirko Montorro
Mirko Montorro
16/09/2026
While artificial intelligence is transforming the way organisations work, it is unfortunately also transforming the way cybercriminals operate.  Phishing emails are becoming more convincing, business email compromise (BEC) attacks are becoming harder to detect, and social e...
Microsoft Draws the Line on SMS and Voice Authentication
Security
Dylan Pylyser
Dylan Pylyser
01/09/2026
Identity has become one of the primary targets for cybercriminals. As AI makes phishing attacks faster, more convincing and increasingly difficult to detect, traditional authentication methods are no longer enough.
Why Industrial Companies Need One Compliance Strategy
Security
Gerrit Neyrinck
Gerrit Neyrinck
26/07/2026
Industrial organisations are facing an unprecedented wave of cybersecurity legislation. NIS2, the Cyber Resilience Act (CRA) and the EU Machinery Regulation each introduce new obligations, but they are not three separate problems to solve. Together, they reflect a broader shift t...