I am developing a SIP VOIP application in s60 3rd ed. Also i have JAIN SLEE server which is running locally (LAN). Registration (enable profile) is working fine when i tried from the e61.
But when i move the server to public IP (static IP, and different service provider), i was unable to register the profile.

What could be the problem? should this is because of any of these NAT / STUN / TURN / ICE ? is it possible to set STUN settings in s60 3rd ed devices?

Please someone help me...