Hi, > You need to have IGMP snooping enabled on your switch to > prevent packets going to destinations that have not subscribed > to the multicast stream. Thanks for the IGMP keyword! Unfortunately I can't find a way to enable this option on the router. I'll ask the provider. > Maybe it helps if you exclude the loopback interface (not sure > if the multicast is received on the loopback however): > iptables -A OUTPUT -d 224.0.0.56 ! -o lo -j DROP No, it doesn't work, all packets are dropped. I guess because sent packets are not assigned an interface at this point... Damien
