Sorry I wasn't more clear...how do you find the addresses of the servers in order to block them? I can't figure out how to find them. -- The goal of the broadcast engineer is to get all the meters on the transmitter to go as far to the right as possible!!
I use a program call "trafshow" for regular traffic viewing. When I need to be sure I use "tcpdump" to record the traffic so I can look at it in detail. Both are run on linux or unix.