I have XP pro clients, Cisco 4506 core, 3550/3560 edge switches all on EMI. What I want to do is block music sharing for itunes. I have read that Itunes uses port 3369 and I have that blocked via an access list but iTunes still can see and share libraries. I then ran a packet monitoring program on my machine to see what other ports it had open. I found a few and blocked those and it just found more ports. Any ideas on how to block this music sharing with itunes?
Thanks.