How to make traffic restrictions on the gateway after a certain amount?

Question

linux

There is a gateway on debian linux.
Clients need to limit the speed, for example, if a person has already downloaded 5 gigabytes per day.
and so that these counters are reset the very next day.
there is a solution?

Answer 1

certainly

Answer 2

Any billing system can do this, we set it to your taste and that's it.