Gerard París Aixalà wrote:
I tried this.
And this:
iptables -t mangle -I PREROUTING -d 225.0.0.4 -j DROP #
225.0.0.4 is the multicast address
iptables -t mangle -I PREROUTING -j DROP
But the multicast traffic still arrives at the destination computer.
How do you know that the traffic arrives ??? :) If you see it with some
sniffer programs (tetheral) then that is fake because those programs see
the packets BEFORE they reach the filtering system.
You can not tell a packet not to enter your network card... :D
BTW.: What does the counters of the packets matching your rules says ???
(iptables -L -v -n -t mangle)