The Multicast Tester is a simple tool for users to test their IP Multicast connectivity.
Multicast Tester: Step 1
You may opt to click the "Grant Always" or "Remember this decision" if you will be running the test more than once.
On a Macintosh you must be running OS X.
Older versions of Netscape will prompt you three times. You will need to click "Grant" on each dialog box.
Netscape version 4.x and earlier must
start the test here