I need to disconnect users

[Ariel García Reyes]

I need to disconnect users that in 1 month already have consumed 1gbyte of
data.
The NAS sends me the traffic of the network every 5 minutes.
The question is: how to do that when I get the data that the user has
already consumed the traffic that was assigned, the freeradius disconnect
the user ?.

I am using the RadiusDesk implementation, I have configured plans and they
work, but the consumption check is when the user is going to log in only.

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Lic. Ariel García Reyes.
GNU/Linux Registered User #357058