Within your firewall, you will need ports 80 (HTTP) or 1755 (UDP, TCP) opened and free of filters. You will also need to allow calls to the "63.250.215.*" range of IP addresses, and the following URL domains:

• *.launch.yahoo.com
• *.yahoo.com
• *.yimg.com
• *.akamai.net

Certain firewalls, such as Norton Internet Security, also contain ad removal features that may be enabled. You will need to disable or configure these to permit streams from Yahoo! LAUNCHcast.