How do I open up firewalls of my network to be able to use WebRoom?

You have to open the firewalls for the following 4 servers:

- janus0.ap-southeast-1.iteach.world
- janus0.eu-central-1.iteach.world
- janus0.eu-west-3.iteach.world
- janus0.us-east-1.iteach.world
- janus0.sa-east-1.iteach.world

And for the following TCP and UDP ports:

- TCP: 80, 443, 5349, 3478, 50000-65535
- UDP: 80, 443, 5349, 3478, 50000-65535