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Hi guys, i tried adding what was my solution, but the previous thread wasn't open for replies.
Old thread
https://www.3cx.com/community/threads/issues-on-apps-access-outside-the-network.74613/
Briefing
3CX Softphone wouldn't work outside PABX LAN, except if i use a third-party VPN client (ex.: OpenVPN) on my smartphone. This problem was reproduced on Android and iOS, additional/detailed specs can be reviewed on the previous thread.
I stated that before problem began, i've done some tests with Direct SIP feature and when this issue arised, i went on to disable it.
Somehow this (intentionally or not) Direct SIP changed SIPDOMAIN parameters within 3CX, lefting NO matching external FQDN/SIP Domain for softphone external use.
I came to this troubleshooting extension connection with Zoiper, since for what i understood, the problem was software based - probably months ago when i first interacted with the previous thread, i might have configure the Zoiper app with my extension using public IP address or something else that made this app work while 3CX's own app wasn't.
Well, yesterday, my extension would register on Zoiper, but i was unable to place calls. I runned wireshark on the server and saw SIP 603 codes declining my call due to unknown caller - therefore i went to check SIP DOMAINS (sipdomain and sipdomain2) parameters on 3CX to precisely get which domain should i use to add along with my extension to zoiper app, since the external FQDN that i use for management wasn't working.
Bingo, there was one sipdomain with internal FQDN pabx.localdomain.com.br (no certificate) and a second sipdomain with another internal domain local.com.br instead of pabx-example.my3cx.com.br.
I think, but i won't reproduce it just to make a clear conclusion, that back then, when i enabled Direct SIP, the FQDN supplied by 3CX (which it has certificate) was changed to the domain used within Direct SIP.
I manually corrected and everything well back to normal.
I'm glad i didn't have to fully reinstall 3CX, it was going to be my follow step.
Regards,
Rafael da Costa
Old thread
https://www.3cx.com/community/threads/issues-on-apps-access-outside-the-network.74613/
Briefing
3CX Softphone wouldn't work outside PABX LAN, except if i use a third-party VPN client (ex.: OpenVPN) on my smartphone. This problem was reproduced on Android and iOS, additional/detailed specs can be reviewed on the previous thread.
I stated that before problem began, i've done some tests with Direct SIP feature and when this issue arised, i went on to disable it.
Somehow this (intentionally or not) Direct SIP changed SIPDOMAIN parameters within 3CX, lefting NO matching external FQDN/SIP Domain for softphone external use.
I came to this troubleshooting extension connection with Zoiper, since for what i understood, the problem was software based - probably months ago when i first interacted with the previous thread, i might have configure the Zoiper app with my extension using public IP address or something else that made this app work while 3CX's own app wasn't.
Well, yesterday, my extension would register on Zoiper, but i was unable to place calls. I runned wireshark on the server and saw SIP 603 codes declining my call due to unknown caller - therefore i went to check SIP DOMAINS (sipdomain and sipdomain2) parameters on 3CX to precisely get which domain should i use to add along with my extension to zoiper app, since the external FQDN that i use for management wasn't working.
Bingo, there was one sipdomain with internal FQDN pabx.localdomain.com.br (no certificate) and a second sipdomain with another internal domain local.com.br instead of pabx-example.my3cx.com.br.
I think, but i won't reproduce it just to make a clear conclusion, that back then, when i enabled Direct SIP, the FQDN supplied by 3CX (which it has certificate) was changed to the domain used within Direct SIP.
I manually corrected and everything well back to normal.
I'm glad i didn't have to fully reinstall 3CX, it was going to be my follow step.
Regards,
Rafael da Costa
