Mobile phone cannot access to 3CX server from 3G/4G network

[Kane Wong]

Hello all 3CX experts;

I am trying to configure my 3CX server to allow register mobile phone outside the LAN, the iphone and the android phone works fine with the 3CX app while using at LAN. When try to use through cellular network or from home wifi network, it is not able to registered the phone. I saw the following logs from the Dashboard.

• SIP Server/Call Manager ID: 4101
  Extension 29920 is unregistered, removed contact: sip:[email protected]:5060;rinstance=0-phjxkzygitm5xltfjbgwzypugtbvevjw;inst="799563", received from: 127.0.0.1
• 07/11/2019 8:52:48 PM
  
  SIP Server/Call Manager ID: 4101
  Extension 29920 is registered, contact: sip:[email protected]:5483;rinstance=ac9b0927e045c582, received from: 127.0.0.1

The firewall check on 3CX server is success, all "Green" light except the "detecting SIP ALG... not detected".
The "Disallow use of extension outside the LAN (Remote extensions using Direct SIP or STUN will be blocked)" in Options of the extension is not enable.
The necessary tcp / udp ports are open subject to the 3CX sites.

What else should I check?

thanks!

 

[Kane Wong]

The public ip address of my 3CX server was changed yesterday, would it be the issue?

I have checked the my3cx domain name which is pointing to my new ip address already.

I found the pbx reject my call from the Activity Log

07/12/2019 8:16:31 PM - Leg L:7.1[Unknown:] is terminated: Cause: BYE from PBX

07/12/2019 8:16:31 PM - Terminated from "3cxUser"<sip:[email protected]3cx.ca>;tag=R6UW0TsQNa4NFLtXq7VfxQW05E6Ci8p6 to <sip:[email protected]3cx.ca;tag3cx=phd9o4rm>;tag=ca465f27; reason: Rejected

07/12/2019 8:16:31 PM - L:7.1[Unknown:] Sending: OnSendResp Send 603/INVITE from 0.0.0.0:0 tid=PjCuG.xAmjqm8X7nHlImjepWLXIVBT5hHi Call-ID=TPNFDhckMZ8Zwh6p1.RH5jnEVgFLR2cZ: SIP/2.0 603 Decline Via: SIP/2.0/UDP 127.0.0.1:5080;branch=z9hG4bK-524287-2---PjCuG.xAmjqm8X7nHlImjepWLXIVBT5hHi;rport=5080 Via: SIP/2.0/UDP [::ffff:154.5.40.223]:51939;branch=z9hG4bK-524287-1---tunneltid;rport;tnlid=clnt.1-.bocskyvbbkw1hapoid..wxhhuwu2yht Via: SIP/2.0/TCP 127.0.0.1:50195;rport;branch=z9hG4bKPjCuG.xAmjqm8X7nHlImjepWLXIVBT5hHi;alias To: <sip:[email protected]3cx.ca;tag3cx=phd9o4rm>;tag=ca465f27 From: "3cxUser"<sip:[email protected]3cx.ca>;tag=R6UW0TsQNa4NFLtXq7VfxQW05E6Ci8p6 Call-ID: TPNFDhckMZ8Zwh6p1.RH5jnEVgFLR2cZ CSeq: 1108 INVITE Warning: 499 3CX001 "Caller is forbidden" Content-Length: 0

07/12/2019 8:16:31 PM - SendMsg from <sip:[email protected]3cx.ca;tag3cx=phd9o4rm>;tag=ca465f27 to "3cxUser"<sip:[email protected]3cx.ca>;tag=R6UW0TsQNa4NFLtXq7VfxQW05E6Ci8p6

07/12/2019 8:16:31 PM - OnOffer from "3cxUser"<sip:[email protected]3cx.ca>;tag=R6UW0TsQNa4NFLtXq7VfxQW05E6Ci8p6

07/12/2019 8:16:31 PM - [CM502001]: Source info: From: "3cxUser"<sip:[email protected]3cx.ca>;tag=R6UW0TsQNa4NFLtXq7VfxQW05E6Ci8p6; To: <sip:[email protected]3cx.ca;tag3cx=phd9o4rm>

07/12/2019 8:16:31 PM - [CM503013]: Call(C:7): Incoming call rejected, caller is unknown; msg=Invite-IN Recv Req INVITE from 127.0.0.1:5080 tid=PjCuG.xAmjqm8X7nHlImjepWLXIVBT5hHi Call-ID=TPNFDhckMZ8Zwh6p1.RH5jnEVgFLR2cZ: INVITE sip:[email protected]:5060;transport=UDP;tag3cx=phd9o4rm SIP/2.0 Via: SIP/2.0/UDP 127.0.0.1:5080;branch=z9hG4bK-524287-2---PjCuG.xAmjqm8X7nHlImjepWLXIVBT5hHi;rport=5080 Via: SIP/2.0/UDP [::ffff:154.5.40.223]:51939;branch=z9hG4bK-524287-1---tunneltid;rport;tnlid=clnt.1-.bocskyvbbkw1hapoid..wxhhuwu2yht Via: SIP/2.0/TCP 127.0.0.1:50195;rport;branch=z9hG4bKPjCuG.xAmjqm8X7nHlImjepWLXIVBT5hHi;alias Max-Forwards: 69 Record-Route: <sip:[email protected]:5080;user=proxy;uri=clnt.1-.bocskyvbbkw1hapoid..wxhhuwu2yht> Contact: "3cxUser" <sip:[email protected]:5060;inst="5DE9FC";rinstance=1-.bocskyvbbkw1hapoid..wxhhuwu2yht> To: <sip:[email protected]3cx.ca;tag3cx=phd9o4rm> From: "3cxUser"<sip:[email protected]3cx.ca>;tag=R6UW0TsQNa4NFLtXq7VfxQW05E6Ci8p6 Call-ID: TPNFDhckMZ8Zwh6p1.RH5jnEVgFLR2cZ CSeq: 1108 INVITE Session-Expires: 1800 Min-SE: 90 Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS Content-Type: application/sdp Proxy-Authorization: Digest username="29920",realm="3CXPhoneSystem",nonce="414d535c1339de0f63:dbb902ffbe01dabc7f6ef4089bf7edbd",uri="sip:[email protected]3cx.ca;transport=tcp;tag3cx=phd9o4rm",response="0335b551340b360bdde2f8032dac630b",algorithm=MD5 Supported: replaces, 100rel, timer, norefersub User-Agent: 3CXPhone for iPhone 15.5.18.472 Content-Length: 365

 

[Kane Wong]

Problem resolved.

It was caused by the incorrect "Local SIP Domain" in FQDN settings.

I went through this thread to find the tips.

https://www.3cx.com/community/threads/3cxphone-v14-remote-calls-forbidden.43789/

 

[leejor]

If the App is attempting to contact the 3CX server, when outside the local LAN, using the local IP, then Yes, that's a problem, and was probably caused by an incorrect datafill/option selection, when the initial install was done. It may have been in the options chosen under step 3...
https://www.3cx.com/docs/manual/configuring-your-pbx/