Does a free firewall (pfSense) still protect your company? The difference between pfSense and a FortiGate NGFW
October 21, 2026
Many small and mid-sized companies took their first steps in network security with open-source tools such as pfSense. For years, it did the job of a router and a port firewall (layer 4). The threat profile has changed: digital crime today does not only look for open ports. It travels through encrypted connections, legitimate links and human error.
If the company still depends on a dedicated machine running a free firewall, without active threat-intelligence signatures, the risk may be higher than it looks. Is a free firewall still worth keeping? For an SMB, the answer depends on what that box actually inspects today.
Traditional firewall and Next-Generation Firewall
pfSense is a respected tool, but it depends on extra packages, continuous manual configuration and hardware that usually has no dedicated security acceleration. In the pfSense vs FortiGate comparison, the difference shows up at the application layer.
A FortiGate NGFW, such as the FG-50G, FG-70G and FG-90G models, operates at layer 7 with hardware built to inspect traffic without bringing down network performance.
| Criterion | Free solutions / pfSense | FortiGate NGFW (G Series) |
|---|---|---|
| Threat intelligence | Based on public lists or manual lists | Fed in real time by FortiGuard's global AI |
| Encrypted SSL/TLS inspection | High CPU use on ordinary hardware | Dedicated processing on a high-speed chip (ASIC) |
| Signature updates | Dependent on a manual IT routine | Continuous antivirus and IPS updates |
| Continuity and failures | Generic hardware prone to breakdowns | Enterprise hardware on loan, with fast replacement |
| Visibility and LGPD | Logs that are simple, or hard to extract | Executive and forensic reports for compliance |
What the UTP license changes in practice
The leap is not only swapping the equipment. It is keeping the security layer fed. With active UTP (Unified Threat Protection) licenses on the FortiGate, the company gets:
- Intrusion prevention (IPS): blocking of intrusion attempts and automated scans before they reach the servers.
- Network antivirus: real-time inspection of files moving across the network, in the browser or in attachments.
- Web content filter and application control: restriction of risky categories, improper access and software with high consumption or operational risk.
- SD-WAN and VPN: encrypted connections for external teams and redundancy across more than one internet provider.
Visibility with FortiCloud and FortiAnalyzer
Having a firewall that blocks threats is the baseline. The manager needs to know what is happening.
- FortiCloud: remote access, automatic alerts and a view of network health.
- FortiAnalyzer: management dashboards, productivity metrics, reports of attack attempts and technical evidence for privacy and for article 46 of the LGPD, the Brazilian General Data Protection Law.
Mailou Defender: a Fortinet firewall for SMBs, without buying the hardware
Moving from a free solution to an enterprise setup does not require tying up tens of thousands of reais in an equipment purchase. Mailou Defender is a managed firewall for companies: the Fortinet hardware goes out on loan, in the FG-50G, FG-70G and FG-90G models, sized by the number of connections and users.
The subscription includes active UTP licenses, migration and sustainment. Monthly plans, with everything included, start at R$ 790.00/month. In Joinville and the surrounding region, Mailou Defender stays with Mailou Cloud.
No system eliminates 100% of the risks. The role of whoever runs the company is to keep the attack surface small and to have someone watching the perimeter so they can act fast when needed.
The managed firewall scope is on Mailou Cloud. To size the equipment for your network, talk to the team at contact.