Re: Problem with iptables with -j TOS and MARK

Linux Advanced Routing and Traffic Control

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On 28-07-2006 14:43, makevuy wrote:
Hy,

I would want to mark the packets that are entering in a machine, with a mark for using diffserv with DSMARK.

My machine has 2 interfaces, a ethernet and a wireless. The ethernet interface is eth1 and the other is wifi0.

Firs, I would want to test that I would be able to mark the tos of the paquets that I would be receiving, for this I write in the console of my linux:


iptables -A PREROUTING -i eth1 -t mangle -p udp -j TOS --set-tos 0x20

But the TOS doesn't change (I see this with ethereal)

Waht could be the problem?

If I can remember, TOS is inserted for real some time later, so try to investigate on forward or postrouting.

Jarek P.

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