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#. Select a network interface and click **Choose role**.

   .. image:: ../../../images/stor_image17_1.png
      :align: center
      :class: align-center

#. On the **Choose roles** panel, select roles to assign to the network interface (for details, see **Network Interface Roles** in the *Installation Guide*).

   .. image:: ../../../images/stor_image19.png
      :align: center
      :class: align-center

#. If you need to open specific ports on a network interface with public roles, do the following:

   #. Click **Configure**.

      .. image:: ../../../images/stor_image19_1.png
         :align: center
         :class: align-center

   #. On the **Configure custom role** panel, create custom roles: click **Add** and specify role names and ports. Custom roles can later be assigned to any network interface in a cluster. 

      To remove a custom role, make sure it is not assigned to any interface, select it, and click **Remove**.

   #. Click **Done** to return to the **Choose roles** panel.

#. Select the required roles and click **Done** to assign them.
