Configure Fortinet Appliance to interoperate with Okta via RADIUS
This guide details how to configure a Fortinet appliance to use the Okta RADIUS Server Agent.
Topics
Before you begin
Before installing the Okta RADIUS Agent ensure that you have met these minimum requirements for network connectivity:
Source | Destination | Port/Protocol | Description |
---|---|---|---|
Okta RADIUS Agent | Okta Identity Cloud | TCP/443 HTTP |
Configuration and authentication traffic |
Client Gateway | Okta RADIUS Agent | UDP/1812 RADIUS (Default, may be changed in RADIUS app install and configuration) | RADIUS traffic between the gateway (client) and the RADIUS Agent (server) |
Limitations
Only a single Okta Verify device should be enrolled. Enrolling second and subsequent Okta Verify devices may cause undefined or unexpected behavior.
Supported factors
The following MFA
When integrating with Okta RADIUS, the maximum supported number of enrolled
MFA |
Password Authentication Protocol PAP |
Extensible Authentication Protocol - Generic Token Card EAP-GTC |
Extensible Authentication Protocol - Tunneled Transport Layer Security EAP-TTLS |
---|---|---|---|
Custom TOTP Authentication | Supported | Supported | Supported - as long as challenge is avoided. For example MFA only or "Password, passcode". |
Duo(Push, SMS and Passcode only) | Supported | Supported | Duo passcode only. |
Supported |
Supported |
Supported when string "EMAIL" is initially sent. |
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RADIUS does not support inline enrollment with Email. When using inline enrollment, either disable Email or specify Password reset in Email settings. |
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Supported | Supported | Supported - as long as challenge is avoided. For example MFA only or "Password, passcode". |
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Supported | Supported | Supported - as long as challenge is avoided. For example: MFA-only or "Password, MFA" for TOTP. Push can work with primary authentication with MFA as the push challenge is sent out-of-band. |
|
Not supported |
Not supported |
Not supported |
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Supported | Supported | Supported when string "CALL" is sent. See associated note. |
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Supported | Supported | Supported - as long as challenge is avoided. For example MFA only or "Password, passcode". |
RADIUS supports three authentication methods:
- Password + MFA: Primary authentication using password, then user is prompted to select factors to complete the authentication.
- MFA Only: Instead of password, user enter either One Time Passcode, or one of “EMAIL”, “SMS”, “CALL”, “PUSH” (case insensitive).
- Password,Passcode: Password entered immediately followed by passcode in a request.
Must be in the same request, for example: Abcd1234,879890” or “Abcd1234,SmS”.
The following authentication methods are supported by protocol:
Protocol | Supports |
---|---|
PAP | Password and MFA, MFA, "Password and passcode". |
EAP-TTLS | MFA only, "Password and passcode". |
EAP-GTC | Password and MFA, MFA only, "Password and passcode". |
Must send the specified the string “EMAIL/SMS/CALL”, which will initially return a failure, but will result in the generation of an One Time Passcode(OTP) provided using the specified method. The provided OTP can then be used for authentication.
EAP-TTLS does not support enrollment
Authentication will fail unexpectedly when EAP-TTLS is enabled, either Okta Verify or Phone are specified as required enrollment policy, and the user is not enrolled in that
The U2F Security and Windows Hello MFA factors are not compatible with RADIUS-enabled implementations.
For additional information about the RADIUS apps refer to Configuring RADIUS applications in Okta.
Passwordless authentication
RADIUS authentication uses passwords as the primary authentication mechanism. Traditional RADIUS authentication cannot be performed with passwordless users. RADIUS can use other factors for authentication when the application setting property Okta performs primary authentication is unchecked. See2FA Only (Passwordless Mode) in RADIUS applications in Okta for addition detail.
For more information on passwordless authentication see Set up passwordless sign-in experience.
Typical workflow
Task |
Description |
---|---|
Download the RADIUS agent |
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Install the Okta RADIUS Agent. | |
Configure application |
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Configure gateway |
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Configure optional settings |
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Test |