FortiGate - RadSec Configuration

Configure RadSec (RADIUS over TLS) on FortiGate wireless controllers and FortiAP access points for secure OpenRoaming authentication with IronWiFi. This guide covers certificate installation via GUI, CLI-based RadSec configuration, and Hotspot 2.0 profile creation for FortiOS 7.x deployments.

Quick Start

Enable RadSec and OpenRoaming in IronWiFi Console
Download certificate bundle
Import certificates via FortiGate GUI (System > Certificates)
Configure RADIUS server with RadSec via CLI
Create Hotspot 2.0 profile with OpenRoaming OIs
Apply to wireless VAP

Prerequisites

In FortiGate:

FortiGate with FortiOS 7.0 or later
FortiAP access points
CLI access (required for RadSec configuration)

In IronWiFi Console (complete these first):

Create or select a Network in the IronWiFi Console
Enable OpenRoaming from the dropdown menu
Enable RadSec from the dropdown menu
Download the certificate bundle (ZIP file containing Root CA, Intermediate CA, client certificate, and private key)

Important Note

FortiGate RadSec configuration requires CLI access. The GUI does not support all RadSec settings.

Certificate Installation

Upload Certificates via GUI

Log in to FortiGate web interface
Go to System > Certificates

Import CA certificates:

Click Import > CA Certificate
Upload
```
iw-rsa-root-ca.cert.pem
```
Name:
```
IronWiFi-Root-CA
```
Upload
```
iw-rsa-radsec-signing-ca.cert.pem
```
Name:
```
IronWiFi-RadSec-CA
```

Import client certificate:
- Click Import > Local Certificate
- Upload
```
client.cert.pem
```
  and
```
client.key.pem
```
- Name:
```
IronWiFi-RadSec-Client
```

Verify Certificates

After import, certificates should appear in:

Remote CA Certificates: IronWiFi-Root-CA, IronWiFi-RadSec-CA
Local Certificates: IronWiFi-RadSec-Client

CLI Configuration

Configure RADIUS Server with RadSec

Connect to FortiGate CLI and configure:

config user radius
    edit "IronWiFi-RadSec"
        set server "radsec.ironwifi.com"
        set secret ""
        set radius-port 2083
        set transport-protocol tls
        set ca-cert "IronWiFi-Root-CA"
        set client-cert "IronWiFi-RadSec-Client"
        set server-identity-check enable
        set interface-select-method auto
    next
end

Key Parameters Explained

Parameter	Value	Description
`server`	radsec.ironwifi.com	RadSec server address
`secret`	""	Empty for RadSec (uses certs)
`radius-port`	2083	Standard RadSec port
`transport-protocol`	tls	Enable RadSec
`ca-cert`	IronWiFi-Root-CA	CA for server verification
`client-cert`	IronWiFi-RadSec-Client	Client certificate

Configure User Group

config user group
    edit "RadSec-Users"
        set member "IronWiFi-RadSec"
    next
end

Wireless Configuration

Create SSID with Passpoint

config wireless-controller vap
    edit "OpenRoaming"
        set ssid "OpenRoaming"
        set security wpa2-only-enterprise
        set auth usergroup
        set usergroup "RadSec-Users"
        set radius-server "IronWiFi-RadSec"
        set local-bridging enable
        set local-lan enable
        set hotspot20-profile "IronWiFi-Passpoint"
    next
end

Configure Hotspot 2.0 Profile

config wireless-controller hotspot20 hs-profile
    edit "IronWiFi-Passpoint"
        set internet enable
        set venue-group business
        set venue-type unspecified
        set domain-name "ironwifi.net"
        set wan-metrics-link-status up
        set wan-metrics-symmetric-link enable
        config roaming-consortium
            edit 1
                set oi "5A03BA0000"
            next
            edit 2
                set oi "5A03BA0200"
            next
            edit 3
                set oi "004096"
            next
        end
    next
end

Configure NAI Realm

config wireless-controller hotspot20 anqp-nai-realm
    edit "IronWiFi-Realm"
        set nai-realm "ironwifi.com"
        config eap-method
            edit 1
                set method eap-ttls
                config auth-param
                    edit 1
                        set id non-eap-inner-auth
                        set val pap
                    next
                end
            next
        end
    next
end

Link NAI Realm to Profile

config wireless-controller hotspot20 hs-profile
    edit "IronWiFi-Passpoint"
        set nai-realm "IronWiFi-Realm"
    next
end

Complete Configuration Script

Copy and paste this complete configuration:

# Certificates (import via GUI first, then reference here)

# RADIUS with RadSec
config user radius
    edit "IronWiFi-RadSec"
        set server "radsec.ironwifi.com"
        set secret ""
        set radius-port 2083
        set transport-protocol tls
        set ca-cert "IronWiFi-Root-CA"
        set client-cert "IronWiFi-RadSec-Client"
        set server-identity-check enable
    next
end

# User Group
config user group
    edit "RadSec-Users"
        set member "IronWiFi-RadSec"
    next
end

# NAI Realm
config wireless-controller hotspot20 anqp-nai-realm
    edit "IronWiFi-Realm"
        set nai-realm "ironwifi.com"
        config eap-method
            edit 1
                set method eap-ttls
            next
        end
    next
end

# Roaming Consortium
config wireless-controller hotspot20 anqp-roaming-consortium
    edit "OpenRoaming-OIs"
        config oi-list
            edit 1
                set oi "5A03BA0000"
            next
            edit 2
                set oi "5A03BA0200"
            next
            edit 3
                set oi "004096"
            next
        end
    next
end

# Hotspot 2.0 Profile
config wireless-controller hotspot20 hs-profile
    edit "IronWiFi-Passpoint"
        set internet enable
        set venue-group business
        set venue-type unspecified
        set domain-name "ironwifi.net"
        set nai-realm "IronWiFi-Realm"
        set roaming-consortium "OpenRoaming-OIs"
        set wan-metrics-link-status up
    next
end

# SSID
config wireless-controller vap
    edit "OpenRoaming"
        set ssid "OpenRoaming"
        set security wpa2-only-enterprise
        set auth usergroup
        set usergroup "RadSec-Users"
        set radius-server "IronWiFi-RadSec"
        set hotspot20-profile "IronWiFi-Passpoint"
    next
end

Firewall Policy

Create firewall policy for RadSec users:

config firewall policy
    edit 0
        set name "RadSec-Internet"
        set srcintf "OpenRoaming"
        set dstintf "wan1"
        set srcaddr "all"
        set dstaddr "all"
        set action accept
        set schedule "always"
        set service "ALL"
        set nat enable
        set groups "RadSec-Users"
    next
end

Verification

Check RADIUS Configuration

diagnose test authserver radius IronWiFi-RadSec

Check RadSec Connection

diagnose debug application radiusd -1
diagnose debug enable

Check Certificate Status

get system certificate local
get system certificate ca

Monitor Authentication

diagnose wireless-controller wlac -c sta

Troubleshooting

RadSec Connection Failures

Certificate Issues

diagnose vpn ssl debug-filter src-addr4 radsec.ironwifi.com
diagnose debug application sslvpn -1
diagnose debug enable

Verify Certificates
- Check certificate validity
- Ensure CA chain is complete
- Verify client cert matches key
Network Issues
- Verify port 2083 open outbound
- Check DNS resolution
- Test connectivity to RadSec server

Authentication Problems

Check RADIUS Events

diagnose debug application radiusd -1
diagnose debug enable

Review FortiAnalyzer (if available)
- Check RADIUS authentication logs
- Look for rejection reasons

Common Errors

Error	Cause	Solution
"TLS handshake failed"	Cert issue	Re-import certificates
"Connection timeout"	Port blocked	Check firewall rules
"Certificate verify failed"	CA not trusted	Import complete CA chain
"No matching realm"	NAI config	Verify realm configuration

Best Practices

Use FortiOS 7.x: Better RadSec support
CLI Configuration: Required for full RadSec setup
Monitor Certificates: Track expiration dates
Test Connectivity: Verify RadSec before production
Backup Configuration: Save working config
Use FortiAnalyzer: For detailed logging

Same vendor

Standards & reference

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Quick Start​

Prerequisites​

In FortiGate:​

In IronWiFi Console (complete these first):​

Important Note​

Certificate Installation​

Upload Certificates via GUI​

Verify Certificates​

CLI Configuration​

Configure RADIUS Server with RadSec​

Key Parameters Explained​

Configure User Group​

Wireless Configuration​

Create SSID with Passpoint​

Configure Hotspot 2.0 Profile​

Configure NAI Realm​

Link NAI Realm to Profile​

Complete Configuration Script​

Firewall Policy​

Verification​

Check RADIUS Configuration​

Check RadSec Connection​

Check Certificate Status​

Monitor Authentication​

Troubleshooting​

RadSec Connection Failures​

Authentication Problems​

Common Errors​

Best Practices​

Related Topics​