I would like deploy Openfire/Jitsi over a private APN (access point name) network. Server and client are between routers that are connected by private GSM network (no access to internet).
Connecting server and client using public APN (with internet access), IM and voice calls works. The necessary port forwarding for Openfire has been configured.
Connecting server and client using private APN, IM works. voice call will fail with "ICE failed and no relay found" error. I tried to configure STUN server with Openfire STUN plugin but the same error occurs.
Does anyone knows what is the criteria to establish voice call successfully in a private GSM network environment? i guess this is different from LAN because there is NAT traversal but i am not sure what are the additional services needed for voice call to be established through NAT traversal.
One more question: if this private GSM network contains a IPv6 DHCP server. Openfire server and jitsi clients are assigned an IPv6 address. Will i be able to establish voice call successfully?
Thanks and Best Regards,FH