[LARTC] Marking returned MASQ'ed packets (ingress, TC, etc.)

Linux Advanced Routing and Traffic Control

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Hi Folks,

I'm using a 2.4.x kernel and TC from the iproute2 package
so that I can limit traffic through my gateway.  I'm using this
to mark packets when they leave the LAN:

/sbin/ipchains -A forward -j MASQ -i eth0 -s 192.168.1.0/24 -d 0.0.0.0/0
-m 1  

When the packets return, I need to have them marked again so that
the ingress filter will limit the bandwidth in the opposite direction.

The only way I have found to do this, is to mark EVERY packet like this:

/sbin/ipchains -A input -i eth0 -s 0.0.0.0/0 -d 12.10.109.52/32 -m 1 

This works, but what I would really like to do, is mark the
192.168.1.0/24 packets instead (after they have been "un-masq'ed", 
so that I can limit bandwidth on each interface in the gateway box.

Is this possible?

Thanks,

Barton



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