Hi Eric,

Unfortunately I can't find my Proxy Server course material right now (and I'm currently running ISA Server), but if I remember right, you should be able to block the site by URL; radio.yahoo.com (as one example). Not sure if a packet filter will work since they are probably using port 80...

Hold it... see this is why "Update" is good. It appears they (yahoo) might use port 3456, so you should be able to close that down. Unless of course it's only for broadcasters. You will probably have to dig a bit to find port for some of the other sites...

http://groups.yahoo.com/group/streamingaudio/message/135

HTH

- Brian


>I have several users who use internet radio, and it is consuming a lot of bandwidth. Is there a way to block certain ports to not allow streaming of internet radio over my network? I have MS Proxy 2.0.
>
>Thanks
>Eric