Jitsi-Meet not working from different network

Install & Config
#1

I have installed jitsi-meet on Ubuntu 16.04.6 LTS server. I can have two persons join from same network (LAN/ISP) and it works without any issues. Seems like p2p works. But if they are from different network/ISP, no video and audio. STUN might be failing. I have assigned public IP directly to the server and FW ports are open.

Below are the browser errors -
[JitsiConference.js] <h.sendMessage>: Failed to send E2E ping request or response. undefined
[modules/RTC/BridgeChannel.js] <l._send>: Bridge Channel send: no opened channel.

Below are the errors from jvb.log
network=‘0’ priority=‘2130706431’ protocol=‘udp’ type=‘host’ ip=‘public ip’ port=‘10000’/>
2020-05-14 12:14:12.800 INFO: [44]
ConnectivityCheckClient$PaceMaker.run#919: Pair failed: public ip:10000/udp/host -> 172.23.71.1:58214/udp/host (stream-38f675cd.RTP)
ConnectivityCheckClient$PaceMaker.run#919: Pair failed: public ip:10000/udp/host -> 169.254.34.20:58215/udp/host (stream-38f675cd.RTP)

ConnectivityCheckClient$PaceMaker.run#919: Pair failed: public ip:10000/udp/host -> 192.168.1.4:58216/udp/host (stream-38f675cd.RTP)
ConnectivityCheckClient$PaceMaker.run#919: Pair failed: public ip:10000/udp/host -> 169.254.231.194:58217/udp/host (stream-38f675cd.RTP)

Any help is much appreciated.

#2

Check port forwarding.

#3

I’m not using NAT and no firewall in between.Still need to check on that. Just confused what mistake I’m making…

#4

There are no firewall. I’m just doing testing. All ports are open and public ip directly assigned to the server.