Configure Cisco ASA IKEV2 VPN to interoperate with Okta via RADIUS

Okta provides the ability for organizations to manage authorization and access to on-premises applications and resources using the RADIUS protocol and the Okta RADIUS agent. With the Okta RADIUS Server Agent organizations can delegate authentication to Okta.
This page describes how to configure Cisco ASA IKEV2 VPN to use EAP-TTLS and the Okta RADIUS Server Agent.

Info

Note

If you are using AnyConnect v4.4 and greater and ASA version 9.7.1 and greater consider using SAML.

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)

Supported factors

The following MFA Factors are supported:

 

MFA Factor Password Authentication Protocol
PAP		 Extensible Authentication Protocol - Generic Token Card
EAP-GTC		 Extensible Authentication Protocol - Tunneled Transport Layer Security
EAP-TTLS
Okta Verify (TOTP and PUSH) Supported Supported Supported - as long as challenge is avoided.
For example:
MFA-only or password, MFA for TOTP.
Push can work with primary auth + MFA as the push challenge is sent out-of-band.
Voice Call Supported Supported Not supported
SMS Authentication Supported Supported Not supported
Google Authenticator Supported Supported Supported - as long as challenge is avoided.
For example MFA only or password, MFA.
Symantec VIP Supported Supported Supported
Security Question Supported Supported Not supported
Custom TOTP Authentication Supported Supported Not supported
Duo(Push, SMS and Passcode only) Supported Supported Supported (passcode, Push)
YubiKey Supported Supported Supported

RSA Token

Supported

Supported

Supported

Email

Supported

Supported

Not supported
Info

Note

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.

 

Typical workflow

Task

Description

Download the RADIUS agent
Install the Okta RADIUS Agent.
  • Install either the Windows or Linux RADIUS agents as appropriate for your environment.
Configure application
Configure gateway
Configure optional settings
Configure Windows VPN
Add root CA
Test

Related topics