So I tried Vocaroo. It didn’t work.

I emailed my principal and it was then forwarded to the district level for consideration. The district folks determined that when pressing Record, the request actually went to a different server. That server was blocked by our filters for being a known proxy hosting server. I accept the need to block that server, and wrote off Vocaroo.

However, I decided to email the Vocaroo folks and let them know. Originally they had me check to see if port 1935 was open in our district. It is. A few days later, I got an email from the Vocaroo folks saying..

Hi, just an update on this.

Vocaroo has now moved to a different server, so you should be able to
access it now (unless they deliberately block the vocaroo.com domain).

Wow! Vocaroo works like a charm now! Yay!

I asked whether this was directly related to my emails from earlier and they said:

Yes it was in response to your request – and thanks for reporting the
problem. The more people that can use it, the better

Wow again! I’m impressed. A very public thank you to Vocaroo for being willing to make this change so that my students and presumably many others can use the service.

This goes to show you, it pays to contact folks.