Problem with more than 2 participants

Hello guys, I set up all jitsi on a ubuntu server, everything works ok with 2 participants, but when there are more than 2 participants in the room, everyone is without audio and video. I disabled the firewall, but the error persists.
Can anybody help me? I’ll be very thankfull

Start here:

Thanks, but I noticed that after using netstat I see that port 10000 does not appear in the list, but the jvb service is running.

I also noticed that my network appears to be behind a firewall! Best Regards