@@ -55,12 +55,12 @@ You find some more documentation at the [fairchat FAQs](https://fairchat.eu/fair
### Which ports does fairmeeting require?
Media streams go with RTP UDP through ports 10000-20000. If your firewall is blocking those, as a fallback, https TCP 443 is being used (with poorer quality via a TURN server).
Some organisations may have firewall restrictions. Media streams go with RTP UDP through port 10000. If your firewall is blocking those, as a fallback, https TCP 443 is being used (with poorer quality via a TURN server).
On a terminal, you (or a technician at your office) can test if you can reach high UDP ports with the netcat command:
```
nc -vuz fairmeeting.net 10000
nc -vuz jvb-hetzner-0.fairmeeting.net 10000
Connection to fairmeeting.net 10000 port [udp/*] succeeded!
