[Freeswitch-users] Natting question.

Hello. I have a FS behind firewall on which ports 5080,5060 udp are mapped to the FS server. A client connected directly to Internet, say using GPRS, authorise to FS and calling a number audio is heared. When this client is connected via WiFi to some router connected directly to Internet, client authorises, calls but there is no audio. So I'm stump on where to look for issue: on FS server side with firewall or on client side behind router? Thank you. -- Mimiko desu.