complex; ifb, masq et omnia

Linux Advanced Routing and Traffic Control

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Hi all.

I'm using Jamal's ifb virtual interface from new kernel. Redirecting incoming 
traffic from external interface like that:
# tc [blahbla] match u32 0 0 flowid 1:0 action mirred egress redirect dev ifb0
to ifb to shape it.

The problem is that I'm using MASQUERADE by netfilter also. That redirected 
traffic coming from internet gets to ifb _before_ DNAT is done. So I cannot 
filter or mark it in other way by ip dst address to differ between forwarded 
and incoming traffic to my node.

Goal is to find a solution how to let tc filter find the difference between 
forwarded and incoming traffic in that redirected traffic coming to ifb 
device so shaping/queueing could be done elegantly :-)
(well, infact this traffic goes off ifb device and then gets routed and masqed 
etc- by egress queue)

Anybody got any nice ideas?

Krzysztof
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