I am looking for a bandwidth limiter tool as to time and kilobytes.

[Halid Faith]

Hello

I use dummynet to limit bandwidth on freebsd6.2.  

But I don't know how I limit an ip blocks as to time ( for instance like 1 Gbyte in 1 month ).   

I am looking for a tool which provides to limit bytes according to time.  

is there any free tool for this case?

Thanks already