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From: Andy Furniss <andy.furniss@dsl.pipex.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] simple questions about imq
Date: Mon, 31 Jan 2005 23:39:12 +0000	[thread overview]
Message-ID: <41FEC1A0.9040909@dsl.pipex.com> (raw)
In-Reply-To: <41FD1304.1080305@sch.bme.hu>

Tóth Nándor wrote:
> Hi!
> 
> I have read all informations i could find, but some things are still not 
> clear.
> 
> My setup is:
>  ---INTERNET1(eth0)-\  /- Local net1 (eth2)
>                      GW
>  ---INTERNET2(eth1)-/  \- Local net2 (eth3)
> 
> I have NAT and a working setup using HTB,SFQ, classifying with the 
> iptables -j CLASSIFY way. I shape only the traffic coming from the 
> internet heading to the intranet.
> 
> I would like to have a configuration like this:
>  ---INTERNET1(eth0)-\        /- Local net1 (eth2)
>                      GW--imq0
>  ---INTERNET2(eth1)-/        \- Local net2 (eth3)
> 
> I think it can be done this way:
> iptables -t mangle -A PREROUTING -i eth0 -j IMQ --todev 0
> iptables -t mangle -A PREROUTING -i eth1 -j IMQ --todev 0
> 
> But it would include traffic heading to the gateway directly, wouldn't 
> it?

Yes - but people often want this.

  Can i put these rules to the POSTROUTING chain?
> 
> And i can still have my CLASSIFY targets in the POSTROUTING chain, 
> because IMQ queing will happen after it according to 
> http://lartc.org/howto/lartc.imq.html.
> So for example:
> $IPTABLES -t mangle -A POSTROUTING -o $eth2 ... -j CLASSIFY --set-class 
> 1:30
> $IPTABLES -t mangle -A POSTROUTING -o $eth3 ... -j CLASSIFY --set-class 
> 1:30
> $IPTABLES -t mangle -A POSTROUTING -o $eth2 ... -j RETURN
> $IPTABLES -t mangle -A POSTROUTING -o $eth3 ... -j RETURN
> 
> If i managed to do this, i promise, i will document it to the imq wiki.
> 
> Any advice/help is appreciated!
> 

You need to jump to imq in postrouting, classify should be done first ok 
try and see.

If you only want to shape forwarded traffic you could mark/classify 
using -i and -o in forward and then match on mark/class and -j IMQ in 
postrouting, it will only really matter if you have shaper to lan 
traffic you want to exclude from imq.

I don't see why you are classifying to the same class or need return. If 
you have two seperate internet links you still need two nonsharing 
queues added to the imq device.

Andy.


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  parent reply	other threads:[~2005-01-31 23:39 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-01-30 16:58 [LARTC] simple questions about imq Tóth Nándor
2005-01-31 13:55 ` Andre Correa
2005-01-31 16:59 ` Tóth Nándor
2005-01-31 17:10 ` Andre Correa
2005-01-31 23:39 ` Andy Furniss [this message]
2005-02-01  5:44 ` Tóth Nándor

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