From mboxrd@z Thu Jan  1 00:00:00 1970
From: marcel lilienthal <ml@northernmaniacs.com>
Subject: initiate a broadcast with dnat
Date: Wed, 09 Nov 2005 21:22:27 +0100
Message-ID: <1131567747.9985.22.camel@localhost>
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hello,

i want to initiate a broadcast if a udp packet with destination port
9999 reaches my router.
i have two devices: ppp0 (wan), eth0 (lan). broadcast of eth0 is
192.168.0.255.

when i use
iptables -t nat -A PREROUTING -i ppp0 -p upd --dport 9999 -j DNAT
--to-destination 192.168.0.255:9

the packet gets into the INPUT chain of ppp0 instead of the FORWARD
chain. if i use a non broadcast destination ip, the packet gets into
FORWARD chain.

is there a way to initiate a broadcast with iptables?

regards, marcel