[X-Unix] Limiting thru put

[Kevin Stevens]

On May 7, 2005, at 09:40, Russell McGaha wrote:

> Folks;
>     I don't know if this is possible; but I thought I'd ask  
> anyway.  Is there any way to limit the throughput/bandwidth usage  
> of an interface.  I'm limited to Satellite access and there are  
> times [when I'm trying to get a large file ... say a CD image for  
> instance] when I'd like to throttle my usage to say 25-30kps; this  
> way I could start the D/l when I go to bed and it would be finished  
> when I got up.  Currently what happens, is after about an hour of  
> full bandwidth usage I'm throttled down to 1-4kps [by the provider  
> - Direcway] till the d/l finishes and I'm idle for a while.
>     So back to the question; Is there a practical way to limit the  
> bandwidth usage to a set amount?

QOS support will not help you, as another poster suggested.  You need  
a bandwidth throttle utility.  What you want is dummynet, which works  
in conjunction with the ipfw firewall in FreeBSD, but I don't know if  
it's implemented in OS X.  Google and check around.  Here is a link  
to another possible solution, though I have no experience with it:   
http://www.carrafix.com/

KeS