To listen to LiveATC feeds you need the following ports open on your corporate firewall:
TCP ports 8010-8012 (outbound only)
If you can't get those ports opened then try using our port 80 server:
http://alt.liveatc.net/feed_mountpoint( substitute feed mountpoint name, e.g.,
http://alt.liveatc.net/kjfk_twr )
Most likely you will have to enter this URL directly in your audio player - it does not work directly from a browser.