Hi, Ive just installed 3CX Phone System v3.0.1928.0 with 3 internal extensions. They can call each other fine. I have an iinet.com.au VoIP service which ive added as a VoIP gateway. The status page shows extensions Registered (Idle) and VoIP Line as Registered (Idle). From my log Code: 11:44:00.187 ClientRegs::onSuccess Registration of sip:email@example.com is successful 11:43:59.890 ExtLine::Register Send registration for "0280120413"<sip:firstname.lastname@example.org> 11:43:59.890 ExtLine::Register Use External IP for device line registration DN='10000' device='iinet' 11:43:59.578 StunClient::process STUN resolved external IP=18.104.22.168:51505 by server 22.214.171.124 but when i go to make an external call using the 3CX softphone (outbound dialing rules are default with 0) Code: 11:32:50.328 CallConf::Rejected Call(C:6) is rejected: Forbidden 11:32:50.328 StratInOut::onCancel Call(C:6): Call from Ext.222 to 98491985 terminated; reason: Forbidden 11:32:49.296 CallConf::onIncoming Call(C:6): Incoming call from Ext.222 to sip:email@example.com And when i try into 3cx from external nothing appears on the logs at all. I have set 3CX softphone to directly register with iinet and inbound/outbound works. So im thinking this is a NAT issue. Ive forwarded udp 5060 udp 9000-9003 udp 3478 all to 192.168.0.2 (3CX server). Ive rebooted PC and rebooted router. What should i try next?