installed 3CX on-site, purchased a trunk from Vitelity but can't receive calls. i've seen the other threads here about similar issue. i am not on location so i cannot test outbound at this moment but can tomorrow. i believe the debian firewall is blocking the port(s) but i am unsure. i also have a hardware firewall but have the server 192.168.2.3 on DMZ. 3CX automatically opened the ports during install as i see them with a quick iptables -L command. please see 3CX activity log below (i have redacted any identifying bits) Code: 09/07/2017 4:52:54 PM - [CM102001]: Authentication failed for AuthFail Recv Req REGISTER from 127.0.0.1:5488 tid=32186a556e19547b Call-ID=ZL1CoOEvmaIZfa-tX_AcOQ..: REGISTER sip:XXXX.west.3cx.us SIP/2.0 Via: SIP/2.0/UDP 127.0.0.1:5488;branch=z9hG4bK-524287-1---32186a556e19547b;rport=5488 Max-Forwards: 70 Contact: <sip:firstname.lastname@example.org:5488;rinstance=c4449f8864e329c3> To: "First Name Test Last Name Test"<sip:000@XXXX.west.3cx.us> From: "First Name Test Last Name Test"<sip:000@XXXX.west.3cx.us>;tag=96e3440e Call-ID: ZL1CoOEvmaIZfa-tX_AcOQ.. CSeq: 22 REGISTER Expires: 120 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REGISTER, SUBSCRIBE, NOTIFY, REFER, INFO, MESSAGE Proxy-Authorization: Digest username="4vzcmzc",realm="3CXPhoneSystem",nonce="414d535959b1dbd620:ee042520aa3f639d689257f08bfbfba1",uri="sip:XXXX.west.3cx.us",response="3363bc8b9e8a3280c83e5ed72606ca9b",algorithm=MD5 Supported: replaces User-Agent: 3CX Dialer for Ext.000 Content-Length: 0 ; Reason: Credentials don't match, check that authorization-ID and password match the ones in extension settings 09/07/2017 4:52:54 PM - [Auth] Provided response (3363bc8b9e8a3280c83e5ed72606ca9b doesn't match calc. (7056afadddefebe2d9dc76aeb0d747ab) 09/07/2017 4:49:41 PM - Call to T:Extn:000@[Dev:sip:email@example.com:5488;rinstance=c4449f8864e329c3] from L:3.1[Ivr: PlayFile] failed, cause: Cause: 404 Not Found/INVITE from 127.0.0.1:5488 09/07/2017 4:49:41 PM - [CM503003]: Call(C:3): Call to <sip:000@XXXX.west.3cx.us:5060> has failed; Cause: 404 Not Found/INVITE from 127.0.0.1:5488 09/07/2017 4:49:41 PM - [Flow] Target endpoint for 5555555555 can not be built! 09/07/2017 4:24:08 PM - PBX has dropped a message with 'User-Agent: friendly-scanner' from IP 184.108.40.206 because it is on blocked UAs list 09/07/2017 4:19:56 PM - There's another STUN server that resolves to the same IP: 220.127.116.11:3478; ignored 09/06/2017 4:19:55 PM - Load license has failed, error: 5 09/06/2017 4:19:47 PM - Set log verbosity to MaxLevel = 2, Severity mask = 7 09/06/2017 4:19:47 PM - Loading Contact records from database 09/06/2017 4:19:29 PM - Currently active calls [none] 09/06/2017 4:19:27 PM - Supported Mime Type added:MESSAGE(x-chat/control) 09/06/2017 4:19:27 PM - User-Agent's that is configured to ignore: friendly-scanner,sipsak,smap,Elite 1.0 Brcm Callctrl,sipcli,VaxSIPUserAgent,VaxIPUserAgent,PortSIP,friendly-request,sip-scan,sipvicious,sundayddr,iWar,SIVuS,Gulp,sipv,siparmyknife,Test Agent,eyeBeam release 3006o stamp 17551,SIP Call,PortSIP VoIP,Conaito 09/06/2017 4:19:27 PM - There's no valid Domain certificate/key for server's IP 192.168.2.3 09/06/2017 4:19:27 PM - Adding secure SIP transport at 192.168.2.3:5061 09/06/2017 4:19:27 PM - Transport 0.0.0.0:5060 is joined to SIP multicast group (interface IP: 192.168.2.3) 09/06/2017 4:19:27 PM - Folder for SSL certificates : /var/lib/3cxpbx/Instance1/Bin/Cert 09/06/2017 4:19:27 PM - ** Initializing SIP stack ** 09/06/2017 4:19:27 PM - [CM501006]: Default Local IP address: [192.168.2.3] 09/06/2017 4:19:27 PM - Configuration-specified SIP IP () differs from default local IP reported by system (192.168.2.3) 09/06/2017 4:19:27 PM - [CM501002]: Version: 18.104.22.16849 09/06/2017 4:19:27 PM - [CM501001]: Start 3CX PhoneSystem Call Manager 09/06/2017 4:19:27 PM - [CM501007]: *** Started Calls Controller thread *** 09/06/2017 4:19:27 PM - Startup completed for leo:5485/DBProvider 09/06/2017 4:19:27 PM - [EC200001]: Configuration server is connected: application:leo:5485/DBProvider local:127.0.0.1:35019 remote:127.0.0.1:5485 09/06/2017 4:19:27 PM - Application connected:leo:5485/DBProvider 09/06/2017 4:19:27 PM - Start management threads for leo:5485/DBProvider 09/06/2017 4:19:27 PM - Timezone offset: -420 min. so i believe there's a possible license issue even though i am using freemium now, registration issue with SIP Trunk provider, and a firewall issue? any assistance is greatly appreciated!