Zyxel C1100Z modem web site blocking question.

Paultry

Blocking access to a website at the router does not block streaming audio coming from the blocked website. Is this normal behavior?

Example: When I block auracast.net at the router, any attempt to access auracast.net via browser returns a “blocked by Zyxel” message. With block still in place, on same browser, I can play stream at http://c4.auracast.net:8010/stream.

Is there a way to block the streaming audio at the router?