Re: Bandwidth by port

Linux Advanced Routing and Traffic Control

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Active FTP uses 20/21 tcp on the server side

On Wednesday 11 December 2002 13:38, you wrote:
> On Wednesday 11 December 2002 09:19, David Coello wrote:
> > Hi
> >
> > I am trying to limit the bandwidth by port buy without success.
> >
> > The code is :
> >
> > # Disciplina de encolamiento
> > tc qdisc add dev eth1 root handle 10: cbq bandwidth 10Mbit avpkt 1000 mpu
> > 64
> >
> > # Clase
> > tc class add dev eth1 parent 10:0 classid 10:1 cbq bandwidth 1kbps rate
> > 1kbps allot 1514 prio 1 maxburst 10 avpkt 100 bounded isolated
> >
> > # Filtro
> > # tc filter add dev eth1 parent 10:0 protocol ip handle 3 fw classid 10:1
> >
> > tc filter add dev eth1 parent 10:0 protocol ip u32 match ip dst
> > 0.0.0.0  match ip sport 20 0xffff flowid 10:1
> > tc filter add dev eth1 parent 10:0 protocol ip u32 match ip dst
> > 0.0.0.0  match ip sport 21 0xffff flowid 10:1
> >
> > What am i making bad? I have probed with mark&iptables but with identical
> > result. When i make ftp i download without band limit.
>
> Ftp is very difficult to shape because it can use dynamic ports.  Try using
> active or passive ftp.  I'm not sure wich one uses fixed ports.
>
> Stef
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