$IPTABLES -A OUTPUT -o $INET_IFACE -p icmp -j ACCEPT #icmp
server custom igmp-mcast-receive igmp/any any accept src xxx.xxx.xxx.xxx dst yyy.yyy.yyy.yyyclient custom igmp-mcast-send igmp/any any accept src xxx.xxx.xxx.xxx dst yyy.yyy.yyy.yyy
sudo firehol debug | grep -i igmp