Cisco ISE vs FortiNAC: NAC Comparison

Cisco ISE vs FortiNAC: Enterprise NAC

A NAC (Network Access Control) solution authenticates every device before it accesses the network (802.1X), profiles its type (laptop, smartphone, IoT device, or IP camera), and applies dynamic segmentation policies. It is the cornerstone of a wired/Wi-Fi Zero Trust architecture. The two leading solutions are Cisco ISE (Identity Services Engine) and FortiNAC.

Cisco ISE: The Established Standard

• Launched in 2010 and mature in the market.
• Native Cisco integration: Catalyst, Meraki, WLC, and Firepower through pxGrid.
• Profiling: 300+ predefined device profiles.
• TrustSec + SGT (Security Group Tag) for L2-L7 segmentation without VLANs.
• A core component of Cisco SD-Access for campus networks.
• Price: €85K+ for 1000 endpoints over 5 years (licenses + appliances).
• Learning curve: steep—CCNP Security recommended.

FortiNAC: The Security Fabric Challenger

• Acquired by Fortinet in 2018 (formerly Bradford Networks).
• Multi-vendor: works with non-Fortinet switches/APs.
• Security Fabric integration: FortiGate detects a threat → FortiNAC automatically quarantines the device.
• OT/IoT specialization: DPI for industrial protocols including SCADA, BACnet, and Modbus.
• Price: €50K for 1000 endpoints over 5 years (-40% vs ISE).

Feature Comparison

• 802.1X: both are equivalent (EAP-TLS, PEAP, MAB).
• Profiling: ISE has 300+ profiles | FortiNAC has 200+. ISE is more comprehensive.
• Scalability: ISE supports 500K endpoints | FortiNAC supports 100K. ISE is suited to very large organizations.
• Multi-vendor: native in FortiNAC | ISE performs well in multi-vendor environments but is more mature with Cisco infrastructure.
• OT/IoT: FortiNAC (native industrial DPI) | ISE (with the separate Cisco Cyber Vision IBN solution).

Verdict

• End-to-end Cisco environment: choose Cisco ISE for consistency.
• Fortinet environment: choose FortiNAC for Security Fabric integration.
• Industrial OT: choose FortiNAC for its specialization.
• Very large enterprise with >100K endpoints: choose ISE for scalability.
• Limited budget: choose FortiNAC for a 40% lower TCO.