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Multifactor auth

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  • 1.  Multifactor auth

    Posted Apr 29, 2021 01:03 AM
    Hello ,

    We have a customer who has Aruba 2900 series and 16.x AOS version

    They want to Integrate The wired switch with Fortinet  FortiAuthenticator which provides the token ( Same as RSA token)

    Goal is to have MFA configured on Aruba Switch . The Fortiauthenticator is also acting as Radius Server .

    Can someone give a confimation that Aruba Switch Support MFA ( AD User Password + Token) and provide the required commands to do it


  • 2.  RE: Multifactor auth

    Posted Apr 29, 2021 08:26 AM

    All Aruba switches support TACACS, (which the Forti authenticator is also a tacacs server).

    You'll need to configure the Aruba switch to point to the fortiauthenticator for tacacs.

    tacacs-server host x.x.x.x
    tacacs-server key <tacacs password>
    aaa authentication ssh login tacacs

    That's all that would be done on the Aruba Switch side, everything else needs to be done on the FortiAuthenticator. (I assume you are familiar with FortiAuthenticator, so below are general high level steps)

    Edit your Remote AD user and assign MFA token
    Add the Aruba Switch as a TACACS client
    Create a TACACS policy, using AD as Identity source, and enforce two factor authentication.
    Setup the appropriate TACACS response

    Once that's done, when the switch sends a tacacs request, the FortiAuthenticator will verify AD credentials are correct, and will send the push for the FortiToken. If the user passes both, the FortiAuthenticator will return a accept to the switch and let the user login. (You may need to increase timeout on the switch because of the delay added by 2FA)

    Christopher Wickline

  • 3.  RE: Multifactor auth

    Posted Apr 29, 2021 08:34 AM
    Hi Christopher ,
    Thanks for your reply.
    We are using fortiauthentcator as Radius and we tested 

    The radius authentication via AD works.
    However , to add another layer of security ,customer want MFA ( token based)
    So I am interested in knowing if additional config on Aruba switch is needed for it . Can you send the commands ?


  • 4.  RE: Multifactor auth

    Posted Apr 29, 2021 08:38 AM

    If you are already using the FortiAuthenticator as the radius server and that is working, there is no additional commands needed on the Aruba Switch.

    All the MFA configuration would then be done on the FortiAuthenticator

    Christopher Wickline