No video and sound with more than two participants

UDP/10000 connectivity

Dear emrah!
Thank you your answer!
I did all steps on the Jitsi-Meet-Server as you described.
In the first connection window i typed:
root@example.com:~# ngrep -q 'accessible' udp port 10000

and got this info and a waiting cursor:
interface: eth0 (xxx.xxx.xxx.xxx/255.255.255.255)
filter: ( udp port 10000 ) and ((ip || ip6) || (vlan && (ip || ip6)))
match: accessible

Than i opened a second connection and typed
root@example.com:~# curl "http://example.com?proto=udp&port=10000&text=it-is-accessible"

and got this info on screen
<html>
<head><title>301 Moved Permanently</title></head>
<body>
<center><h1>301 Moved Permanently</h1></center>
<hr><center>nginx/1.18.0 (Ubuntu)</center>
</body>
</html>

but on first connection window i don’t receive any message “It-is-accessible”
When i understand correctly is Port 10000 not opened for external connection
and i have to check why Port 10000 isn’t open?
Regards Mercy

addendum:
I did
iptables-save > /root/firewall.rules
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT
that mean iptables is switched off and let pass all packets, but i have no video and sound when a third person is join a meeting.

This should be

curl "http://checkmyport.emrah.com?proto=udp&port=10000&text=it-is-accessible"

There is a service in my host which send the text back to the related port

Dear emrah!
Yes, i understand that this message has to be displayed, but it’s not displaying on my server and the queston is, how can i fix this problem?
Thanks a lot.
Regards Mercy

Most probably you have a firewall issue. This may be your internal firewall or the hosting provider firewall

Ok, i will talking with my provider.
Regards Mercy

Dear emrah!
I had a long call with our provider and we found the problem. There was a firewall issue from the provider. They fixed this issue and now Jitsi is working fine.
I thank you for your support.

Regards Mercy

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