ipfw + dummynet: bandwidth limiting not working

[Sten Daniel Sørsdal]

> I am running FreeBSD 4.8 STABLE and am trying to use dummynet 
> with ipfw to
> limit bandwidth on my DSL connection.  I have added the rules 
> for dummynet
> to my existing firewall rules in rc.firewall (which are 
> pretty open as you
> can see) in the last two lines below:
> 
> ipfw -f flush
> ipfw add divert natd all from any to any via vx0
> ipfw add pass all from any to any
> ipfw pipe 1 config bw 128K
> ipfw add pipe 1 tcp from x.x.x.x to any
> 
> (x.x.x.x being my public IP address, and vx0 in line 2 being 
> the interface
> for this address)
> 
> By those last two lines I would expect the outbound/inbound 
> traffic to be
> limited to 128Kbps, yet I am still able to transfer data at my normal
> broadband speeds (1.5Mb/768Kb).
> 
> Anyone have any idea why this is not working the way I'd expect it to?
> 

Remove the line that says 'ipfw add pass all from any to any' and it should work.

- Sten