Hello all, I require some assistance in regards to passing multicast traffic through a checkpoint firewall. We have a server which resides on a screened subnet behind a firewall on a 3750 running base image. It is the multicast source. The clients reside on the internal network. Now to allow multicast through this firewall is it as simple as allowing IGMP and allowing udp to the IP of the multicast group and the ports required? Do I have to worry about PIM? Does this make sense? Can someone help?