You enable RADIUS authentication and configure the RADIUS settings in VMware Identity Manager console.


Install and configure the RADIUS software on an authentication manager server. For RADIUS authentication, follow the vendor's configuration documentation.

You need to know the following RADIUS server information to configure RADIUS on the service.

  • IP address or DNS name of the RADIUS server.
  • Authentication port numbers. Authentication port is usually 1812.
  • Authentication type. The authentication types include PAP (Password Authentication Protocol), CHAP (Challenge Handshake Authentication Protocol), MSCHAP1, MSCHAP2 (Microsoft Challenge Handshake Authentication Protocol, versions 1 and 2).
  • RADIUS shared secret that is used for encryption and decryption in RADIUS protocol messages.
  • Specific timeout and retry values needed for RADIUS authentication


  1. In the VMware Identity Manager console Identity & Access Management tab, select Setup.
  2. On the Connectors page, select the Worker link for the connector that is being configured for RADIUS authentication.
  3. Click Auth Adapters and then click RadiusAuthAdapter.
    You are redirected to the identity manager sign-in page.
  4. Click Edit to configure these fields on the Authentication Adapter page.
    Option Action
    Name A name is required. The default name is RadiusAuthAdapter. You can change name.
    Enable Radius Adapter Select this box to enable RADIUS authentication.
    Number of authentication attempts allowed Enter the maximum number of failed login attempts when using RADIUS to log in. The default is five attempts.
    Login page passphrase hint Enter the text string to display in the message on the user login page to direct users to enter the correct Radius passcode. For example, if this text box is configured with AD password first and then SMS passcode, the login page message reads Enter your AD password first and then SMS passcode. The default text string is RADIUS Passcode.
    Enable direct authentication to Radius server during auth chaining Select this box to enable direct user authentication. Users are not required to reenter their credentials.
    Number of attempts to Radius server Enter the total number of retry attempts. If the primary server does not respond, the service waits for the configured time before retrying again.
    Server timeout in seconds

    Enter the RADIUS server timeout in seconds, after which a retry is sent if the RADIUS server does not respond.

    Radius server hostname/address Enter the host name or the IP address of the RADIUS server.
    Authentication port Enter the Radius authentication port number. The port is usually 1812.
    Accounting port Enter 0 for the port number. The accounting port is not used currently.
    Authentication type Enter the authentication protocol that is supported by the RADIUS server. Either PAP, CHAP, MSCHAP1, OR MSCHAP2.
    Shared secret Enter the shared secret that is used between the RADIUS server and the VMware Identity Manager service.
    Realm Prefix (Optional) The user account location is called the realm.

    If you enter a realm prefix string, the string is placed at the beginning of the user name when the name is sent to the RADIUS server. For example, if the user name is entered as jdoe and the realm prefix DOMAIN-A\ is specified, the user name DOMAIN-A\jdoe is sent to the RADIUS server. If you do not configure these text boxes, only the user name that is entered is sent.

    Realm Suffix (Optional) If you specify a realm suffix, the string is placed at end of the user name. For example, if the suffix is, the username is sent to the RADIUS server.
  5. You can enable a secondary RADIUS server for high availability.
    Configure the secondary server as described in step 4.
  6. Click Save.

What to do next

Add the RADIUS authentication method to the default access policy. Go to the Identity & Access Management > Manage > Policies page and edit the default policy rules to add the RADIUS authentication method to the rule. See Managing Authentication Methods to Apply to Users.