I have the following situation: softphone (private ip) -> firewall (publicip) ->  firewall (public ip) -> freeswitch (192.168.1.29) Registration is success but I hear no audio by dialing the extension 9999 installed by default. console log:  2008-08-31 01:59:35 [NOTICE] switch_channel.c:534 switch_channel_set_name() New Channel sofia/internal/1000@192.168.1.29 [00fdf906-98f5-426d-8c4c-ed7c00637d85] 2008-08-31 01:59:35 [INFO] mod_dialplan_xml.c:222 dialplan_hunt() Processing 1->9999@default 2008-08-31 01:59:35 [NOTICE] mod_dptools.c:601 answer_function() Channel [sofia/internal/1000@192.168.1.29] has been answered Pls kindly advise.