2.3 – Radius

{
  "source": {
    "type": "RADIUS",
    "properties": {
      "server": "192.168.12.128",
      "port": "1812",
      "accountingPort": "1813",
      "sharedSecret": "test123"
      "timeout": "60000",
      "retryCount": "3"
    }
  }
}

• Make sure the IP of Spark Gateway is listed as a client on RADIUS server.
• Make sure the timeout is at least 60000 milliseconds if your RADIUS server is using multi factor authentication, like Azure MFA.