Quote Originally Posted by ekymk
DO YOU THINK I CAN SLEEP WELL TONIGHT? WILL THIS WARRANTY ME THAT NO PACKAGE WILL GET OUTSIDE THE LAN?
I've never actually used multicast, but I think you can sleep well. A time-to-live of 32 should restrict the packages to the local network(s).

But according to this site:
Nobody knows what "site" or "region" mean exactly. It is up to the administrators to decide what this limits apply to.
I thought multicast didn't work over the Internet anyway. Most routers has multicast disabled.