I think you need to bind to the multicast group, not the interface, in linux(as I discovered this week, it is the opposite in windows.) I am still trying to figure out how to specify the interface in linux using join_group so if you find out how please add that to the post. hope this helps, Dan -- View this message in context: http://www.nabble.com/No-packets-received-with-boost%3A%3Aasio%3A%3Aip%3A%3A... Sent from the Boost - Users mailing list archive at Nabble.com.