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Table of Contents

Administration Guide

Creating policies

TACACS+ policy configuration is available under Authentication > TACACS+ Service > Policies.

FortiAuthenticator TACACS+ authentication requires that a TACACS+ client is assigned one or more policies. Policies determine the authentication method, identity source, and TACACS+ response for the clients assigned to the policy.

To create a TACACS+ policy:
  1. Go to Authentication > TACACS+ Service > Policies.
    The Create New TACACS+ Policy Wizard opens.
  2.  Enter the following information:
    TACACS+ clients

    Specify the policy name and description.

    Specify all clients that this policy will accept TACACS+ requests from.

      Policy name Enter a name for the policy.
      Description Optionally, enter a description of the policy.
      TACACS+ clients

    Lists the available TACACS+ clients. Select the client(s) to which this policy applies by using the arrows to move clients into the Chosen TACACS+ Clients box.

    For more information about creating TACACS+ clients, see Adding clients.

    Identity source

    Specify the identity sources against which to authenticate end-users.

     

    Username format

    Select one of the following three username input formats:

    • username@realm
    • realm\username
    • realm/username

     

    Use default realm when user-provided realm is different from all configured realms

    When enabled, FortiAuthenticator selects the default realm for authentication when the user-specified realm is different from all configured realms.

     

    Realms

    Add the realms to which the client(s) will be associated.

    • Select a realm from the dropdown menu in the Realm column.
    • Select whether or not to allow local users to override remote users for the selected realm.
    • Select whether or not to use Windows AD domain authentication.
    • Edit the group filter as needed to filter users based on the groups they are in.
    • If necessary, add more realms to the list.
    • Select the realm that will be the default realm for this client.

    Authentication factors

    Specify which authentication factors to verify.

     

    Authentication method

    Select one of the following:

    • Mandatory password and OTP: Two-factor authentication is required for every user.
    • Every configured password and OTP factors: Two-factor authentication is required if it is enabled on the user's account, otherwise, allow one-factor authentication.
    • Password-only: Authenticate users through password verification only. If password authentication is disabled on the user account, the account cannot be authenticated.
    • OTP-only: Authenticate users through token verification only. If token-based authentication is disabled on the user account, the account cannot be authenticated.

     

    Adaptive Authentication

    Enable this option if you would like to have certain users bypass OTP validation, so long as they belong to a trusted subnet.

    Select All trusted subnets to add all the available trusted subnets.

    You can specify the trusted subnets by selecting Specify trusted subnets and clicking the pen icon. This opens a window where you can choose from a list of available trusted subnets.

    Adaptive Authentication is available only for the following authentication types:

    • Mandatory password and OTP

    • Every configured password and OTP factors

    TACACS+ response

    TACACS+ authentication response based on the outcome of the authentication.

  3. Click OK to save the policy.

Creating policies

TACACS+ policy configuration is available under Authentication > TACACS+ Service > Policies.

FortiAuthenticator TACACS+ authentication requires that a TACACS+ client is assigned one or more policies. Policies determine the authentication method, identity source, and TACACS+ response for the clients assigned to the policy.

To create a TACACS+ policy:
  1. Go to Authentication > TACACS+ Service > Policies.
    The Create New TACACS+ Policy Wizard opens.
  2.  Enter the following information:
    TACACS+ clients

    Specify the policy name and description.

    Specify all clients that this policy will accept TACACS+ requests from.

      Policy name Enter a name for the policy.
      Description Optionally, enter a description of the policy.
      TACACS+ clients

    Lists the available TACACS+ clients. Select the client(s) to which this policy applies by using the arrows to move clients into the Chosen TACACS+ Clients box.

    For more information about creating TACACS+ clients, see Adding clients.

    Identity source

    Specify the identity sources against which to authenticate end-users.

     

    Username format

    Select one of the following three username input formats:

    • username@realm
    • realm\username
    • realm/username

     

    Use default realm when user-provided realm is different from all configured realms

    When enabled, FortiAuthenticator selects the default realm for authentication when the user-specified realm is different from all configured realms.

     

    Realms

    Add the realms to which the client(s) will be associated.

    • Select a realm from the dropdown menu in the Realm column.
    • Select whether or not to allow local users to override remote users for the selected realm.
    • Select whether or not to use Windows AD domain authentication.
    • Edit the group filter as needed to filter users based on the groups they are in.
    • If necessary, add more realms to the list.
    • Select the realm that will be the default realm for this client.

    Authentication factors

    Specify which authentication factors to verify.

     

    Authentication method

    Select one of the following:

    • Mandatory password and OTP: Two-factor authentication is required for every user.
    • Every configured password and OTP factors: Two-factor authentication is required if it is enabled on the user's account, otherwise, allow one-factor authentication.
    • Password-only: Authenticate users through password verification only. If password authentication is disabled on the user account, the account cannot be authenticated.
    • OTP-only: Authenticate users through token verification only. If token-based authentication is disabled on the user account, the account cannot be authenticated.

     

    Adaptive Authentication

    Enable this option if you would like to have certain users bypass OTP validation, so long as they belong to a trusted subnet.

    Select All trusted subnets to add all the available trusted subnets.

    You can specify the trusted subnets by selecting Specify trusted subnets and clicking the pen icon. This opens a window where you can choose from a list of available trusted subnets.

    Adaptive Authentication is available only for the following authentication types:

    • Mandatory password and OTP

    • Every configured password and OTP factors

    TACACS+ response

    TACACS+ authentication response based on the outcome of the authentication.

  3. Click OK to save the policy.