@kiokoman Hi, thanks for your interesting about the question. Yes I tried several time with multiple configurations: the most obviously was create vlan 0.836 where igb0 is the main interface where is still attached vlan 0.835 for internet traffic. Telecom says 10.10.10.2/30 so I supposed gw for vlan 0.836 is 10.10.10.1, but with or without gateway the connection isn't really active. So I disabled "monitor gateway" considering it active (i have so many doubts about it as i can't see any relevant traffic on this interface), then I created firewall rules on new WAN 0.836 "any to 224.0.0.0 proto IGMP with applied "allow IP control" option and "any to 239.0.0.8 proto UDP "with applied "allow IP control" option - then on interested internal lan (called IPTV) "allowed IGMP and UDP from network IPTV to 224.0.0.0", in the end I enabled IGMP PROXY with upstream WAN 0.836 and downstream LAN IPTV, nothing to do, I'm missing something, pheraps more than something ;)