Fortinet OT Summit: FortiGate Line Earns IEC 62443-4-2 SL4

Fortinet announced that its FortiOS-based product line, including FortiGate, FortiGate Rugged, FortiWiFi and FortiGate VM, has obtained IEC 62443-4-2 Security Level 4 (SL4) certification. The company disclosed the certification at its 2026 OT Cybersecurity Summit, held in Seocho-gu, Seoul, on November 11, according to datanet.co.kr.

In the welcome address, Van Kon, acting head of Fortinet Korea, presented findings from the 2026 OT Cybersecurity Status Report. Rebecca Chen, Fortinet's head of OT business development for North Asia, then gave a keynote arguing that OT security operating models should be established before technology adoption.

Five actions outlined in the keynote

Chen listed five measures: IT/OT segmentation and microsegmentation, secure remote access, integration of OT security operations and incident response, OT-specific threat intelligence, and an integrated security platform.

Fortinet said its FortiGuard OT Security Service is offered as a subscription that updates signatures for industrial protocols and OT vulnerabilities in near real time.

Fortinet published the 2026 OT Cybersecurity Status Report in June 2026. The survey of more than 700 OT professionals worldwide found that 89% expect stricter regulation within five years, while 71% reported experiencing 1-9 cyber intrusions in the past year.