Fortinet is ending SSL VPN as of FortiOS 7.6.3: what should businesses do right now?
Fortinet recently announced a major development in its remote access management policy. As of FortiOS 7.6.3, support for SSL VPN in tunnel mode will be officially discontinued. Source Reddit | Official Fortinet Documentation
A decision that directly impacts thousands of organisations worldwide, particularly those that have historically deployed Fortinet SSL VPN as their primary remote access solution for mobile workers.
Rather than viewing this decision as a constraint, it is time to see it as a strategic opportunity to modernise the network architecture, by leveraging more robust technologies aligned with current cybersecurity standards.
SSL VPN vs IPsec VPN: what are the technical differences and what are the implications for your infrastructures?
SSL VPN: simplicity and accessibility, but growing limitations
Historically, SSL VPN (Secure Sockets Layer) has established itself in remote working environments for its ease of deployment. It operates via TCP port 443, which is often open in the majority of corporate networks, even behind firewalls or in the presence of NAT/PAT.
This protocol encapsulates traffic within HTTPS sessions, making it a flexible solution, but less performant over long-duration or heavily solicited connections. It also presents increasing limitations in terms of encryption, particularly in light of the emergence of TLS 1.3 and modern cybersecurity requirements.
IPsec VPN: robustness, performance and compliance
The IPsec VPN (Internet Protocol Security), for its part, is based on layer 3 protocols such as ESP (Encapsulating Security Payload) and AH (Authentication Header). It uses UDP ports 500 and 4500, which can sometimes cause issues in certain strict NAT environments — but it offers stronger encryption, better performance, and native integration into enterprise operating systems.
With the end of SSL VPN in FortiOS 7.6.3, Fortinet recommends migrating to IPsec, which ensures greater compatibility with current standards and improved efficiency under heavy usage. Read the official documentation
Transformation opportunity: towards a Zero Trust remote access model (ZTNA)
The end of SSL VPN support at Fortinet is not merely a technical change: it is the ideal moment to rethink your remote access model.
Why stay with a traditional VPN when Zero Trust is within reach?
ZTNA (Zero Trust Network Access) solutions make it possible to move beyond the "network tunnel" model, by favouring a granular, context-aware and identity-based approach. Here are the technology building blocks to consider:
- Advanced encryption: TLS 1.3, HTTP/3, QUIC
- Strong authentication: MFA, SSO, Passkeys, biometrics
- Identity management: integration with Azure AD, Okta, or IDaaS solutions
- Dynamic access control: based on device status, location, user role, etc.
- Application security: application segmentation, real-time access visibility
With Fortinet ZTNA, you can completely disable VPN tunnels for certain use cases, favouring direct, encrypted, and context-aware access to internal resources.
Tailscale, WireGuard and the new generations of modern VPNs
For companies looking for lighter, more flexible and more modern solutions, there are serious alternatives to Fortinet, including:
- Tailscale, based on WireGuard, enables the creation of a secure private network between all nodes, without complex firewall configuration or port forwarding.
- WireGuard, through its minimalist design and cryptographic performance, offers an extremely efficient alternative well-suited to modern environments (cloud, containers, mobility, IoT).
These tools meet the growing expectations of CIOs and CISOs: management simplicity, security by design, Cloud-native integration, while remaining adapted to hybrid environments.
A strategic lever for strengthening cybersecurity and modernising access
This change mandated by Fortinet is not a threat: it is an accelerator for digital transformation and the strengthening of cybersecurity for remote access.
By migrating to technologies such as IPsec, ZTNA or WireGuard, organisations can:
- 🔐 Reduce the attack surface
- ✅ Strengthen regulatory compliance (GDPR, ISO 27001, NIS2…)
- 🌐 Facilitate mobility and secure remote working
- 📉 Reduce operational complexity
- ⚙️ Improve visibility and control of user access
Next steps: anticipate the transition with expert support
Do not be caught off guard by the end of Fortinet SSL VPN. Anticipate it.
Our experts in cybersecurity, network infrastructure and remote access are on hand to support you with:
- Conduct a comprehensive audit of your existing VPN and access solutions
- Evaluate migration options to IPsec, ZTNA or alternative solutions
- Define a security roadmap, integrating business challenges, compliance, and performance
👉 Contact us today to initiate your secure remote access transformation plan and leverage this turning point to build a more resilient and future-oriented IT infrastructure.