Visit firewall enterprise security in 2026 is the first and strongest line of defense against the explosion of cyberthreats targeting Belgian organizations. Ransomware, targeted phishing, intrusion via connected objects, data exfiltration: without a properly sized and administered firewall, no other layer of security will hold. This article deciphers the real threat and the technical choices that make the difference for a SME, ETI or group in Belgium. At WEBIPHI, We design and operate this defense for companies of all sizes.
The threat landscape in Belgium in 2026
According to the Center for Cybersecurity Belgium, attacks increased by 38 % in one year. Ransomware remains the leading cause of business downtime, followed by AI-assisted phishing and supply chain attacks. An unprotected Belgian SME is attacked an average of 24 times a day - the vast majority of these attempts are automated and target known but unpatched vulnerabilities.
What is an enterprise firewall?
A firewall enterprise security is a device (hardware or cloud) that inspects incoming and outgoing network traffic, applies strict rules and blocks any unauthorized connections. It acts as a checkpoint between the Internet and your internal network, but also between internal segments of your infrastructure. Modern firewalls integrate IPS (intrusion prevention), antivirus, sandbox, application control and unified reporting.
Layers of protection provided by an enterprise firewall
Deep traffic inspection (DPI)
Deep Packet Inspection examines not only the headers but also the contents of packets, detecting malware even in encrypted traffic (TLS). This has become mandatory in the face of modern attacks that exfiltrate data via HTTPS.
Application filtering and user control
Next-generation firewalls identify the application used (Microsoft 365, Dropbox, Teams, ChatGPT) and the connected user, then apply fine-grained rules. Example: allow Teams for everyone, restrict ChatGPT to the marketing department, block file sharing to unapproved clouds.
Intrusion prevention (IPS) and sandboxing
The IPS blocks behaviors corresponding to known attack signatures in real time. The sandbox executes suspicious files in an isolated environment to detect malicious behavior before it reaches a workstation.
Zero Trust segmentation
Dividing the network into isolated zones (servers, workstations, IoT, guests) prevents an attacker from gaining access to the entire enterprise after a single compromise. This has become standard practice for any organization that takes cybersecurity seriously.
Common firewall management errors
- Any/any« rules left in place after initial installation.
- Signature and firmware updates ignored for several months.
- No regular log analysis or alerts configured.
- No recovery plan if the firewall fails - see our guide disaster recovery plan.
- Misconfigured VPNs directly expose internal servers.
Regulatory compliance: RGPD and NIS2
Since October 2024, the European directive NIS2 imposes documented cybersecurity measures on a wide range of Belgian companies: energy, transport, healthcare, finance, digital services and critical suppliers. Firewalls are among the fundamental controls required. The RGPD, for its part, imposes appropriate technical protections against the exfiltration of personal data.
The WEBIPHI solution: customized enterprise firewall security
At WEBIPHI, we design a complete defense architecture around the firewall enterprise security choice of hardware, configuration of rules, segmentation, integration with the backupthe antivirus protection and the Secure VPN. We cover initial audit, deployment, ongoing supervision and team training.
Contact WEBIPHI for a free audit of your cyber exposure and a costed recommendation. We will provide you with a roadmap within 5 working days.
FAQ - Enterprise firewall security
How much does a corporate firewall cost in Belgium?
For an SME with 10 to 50 users, expect to pay €2,500 to €7,000 for hardware and €800 to €2,500/year for licenses. To this must be added installation and administration (in-house or outsourced). WEBIPHI offers all-inclusive packages from €250/month.
What are the warning signs that a firewall has been compromised?
Unusual outgoing traffic to unknown destinations, sudden slowdowns, untimely VPN disconnections, multiplied authentication logs, unexpected rule changes. Any such signal should trigger an immediate audit.
Do you need a firewall if you're all in the cloud (Microsoft 365, Google Workspace)?
Yes, your workstations are always accessing external sites and downloading files. Without a network firewall or cloud firewall (FWaaS, SASE), a single compromised workstation can serve as a pivot point for attacking your SaaS data.
Is a firewall enough for NIS2 compliance?
No. The firewall is one of the mandatory controls, but NIS2 also requires access management, incident management, tested backups, team training and regular reporting. WEBIPHI covers the whole perimeter.
