<AuthBy PORTLIMITCHECK> can apply usage limits for arbitrary groups of users. It is implemented in AuthPORTLIMITCHECK.pm. It requires that you have a <SessionDatabase SQL> defined in your Radiator configuration.

This module allows you to specify for example that up to 20 ports can be used by a customer with a certain DNIS, or 10 ports in one POP and 20 ports in another. Users can be grouped by any attribute stored in your SQL Session Database.

Furthermore, you can arrange to set the Class attribute for the session depending on bands of port usage. This could allow you to charge different amounts for the first 10 and the second 10 ports, for example, or to have a premium price for excessive port occupancy. (The Class attribute set this way will be sent back by the NAS in all accounting requests for that session. You could then use the value of the Class attribute to tell your billing system how much to charge for the session. The ability to actually charge differently depends on the functions of your billing system.)

This module must be used in conjunction with some other module that actually performs the authentication of the user. PORTLIMITCHECK should be considered as a pre-check to make sure that the login would be within the port occupancy limits you have specified.

<AuthBy PORTLIMITCHECK> understands also the same parameters as <AuthBy xxxxxx>. For more information, see Section 3.32.