[Click] problem with FromHost

[Puneet Zaroo]

I am just taking a guess here...
Since your client(192.168.0.150) is on the same machine as your router
(192.168.0.150) , i believe you would have assigned these addresses to
other interfaces of the machine as well (ethX)..
So , on packet input, the linux kernel routes the packet according to the
first match in the routing table... in this case, that probably means
local delivery to  the ip stack on the linux kernel, by-passing the fake device...
You could test this out by using a different machine as a webbrowser
client and put in a fake device with that client's ip address.

Anyway, what exactly do you want to do ?
Capture and analyze ddos traffic at a router or an end host?
Regards,
Puneet

> i still haven't got the FromHost thing right.
>
> my first doubt is :
> FromHost documentation says that the kernel passes all packets with
> destination addr as ADDR/MASK to FromHost. I am running a webbrowser client on the
> same m/c as the router. hence i want to receive packets destined for any ip
> addr and not just the fixed ADDR in click. my m/c addr is 192.168.0.150 while my
> gateway addr is 192.168.0.1.
> the script i tried out was:
>
> FromHost(fake0,192.168.0.150/8)->cl::Classifier(12/0806,12/0800);
> cl[0]->ARPResponder(0.0.0.0/0, 1:1:1:1:1:1)->c1::Counter->ToHost;
> cl[1]->c2::Counter->Discard;
>
> i even tried putting 192.168.0.1/8 in FromHost, but to no avail.
>
> i can get a tcpdump output when click is not installed.
> when the above config for click is installed, i can still surf sites, which
> shouldn't have been possible since i'm discarding all packets. also the count
> handlers of both counters remain to zero.
>
> i feel lost and would be very grateful if anyone of you could help me out.
> thank you for your help
>
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