STUN check failure

[genmail]

As of today, I have been unable to get 3CX phone to connect to gizmo network to receive calls made to Gizmo telno, even though I previously had no problem doing so, and have not (knowingly) changed any settings in hardware or software. I can still receive calls to Gizmo telno using Gizmo's own client, so gizmo appears to be working. Tried reinstalling 3CX v5 to repl v4. Also tried changing STUN settings to those recommended by 3cx system forum users; that led to 'authentication failure' vs simply 5 failed attempts to connect each time. Gizmo claims its stun port is 3478 but no evident way to incl that in 3cx config; tried making stun setting in 3cx first stun01.sipphone.com and then stun01.sipphone.com:3478; both failed. If this isn't a STUN problem, what is it? Please advise.

Following is debug:

DX:MP3 Writer initialized
DX:MP3 Encoder initialized
DX:FFDShow not present
Integration with 3CX Call Assistant is OFF
Translation file OK
Attempting to connect 198.65.166.131
Phone got as local port 3047
Plantronics not connected
Jabra not connected
Yealink not connected
RTP engine OK
SIP engine OK
Sound mic device OK []
Sound ring device OK []
Sound speaker device OK []
Sending STUN request
STUN check failed
STUN check failed
STUN check failed
STUN check failed
STUN check failed
STUN check failed
Unable to contact STUN
Translation file OK
Integration with 3CX Call Assistant is OFF
Translation file OK
Attempting to connect 198.65.166.131
Phone requested as local port 3478
Phone requested local port OK
Plantronics not connected
Jabra not connected
Yealink not connected
RTP engine OK
SIP engine OK
Sound mic device OK []
Sound ring device OK []
Sound speaker device OK []
Sending STUN request
STUN check failed
STUN check failed
STUN check failed
STUN check failed
STUN check failed
STUN check failed
Unable to contact STUN
Translation file OK
Integration with 3CX Call Assistant is OFF
Translation file OK
Attempting to connect 198.65.166.131
Phone got as local port 3075
Plantronics not connected
Jabra not connected
Yealink not connected
RTP engine OK
SIP engine OK
Sound mic device OK []
Sound ring device OK []
Sound speaker device OK []
Sending STUN request
STUN check failed
Translation file OK
Integration with 3CX Call Assistant is OFF
Translation file OK
STUN check failed
STUN check failed
Integration with 3CX Call Assistant is OFF
Translation file OK
Attempting to connect 198.65.166.131
Phone got as local port 3076
Plantronics not connected
Jabra not connected
Yealink not connected
RTP engine OK
SIP engine OK
Sound mic device OK []
Sound ring device OK []
Sound speaker device OK []
Integration with 3CX Call Assistant is OFF
Translation file OK
Attempting to connect 198.65.166.131
Phone got as local port 3079
Plantronics not connected
Jabra not connected
Yealink not connected
RTP engine OK
SIP engine OK
Sound mic device OK []
Sound ring device OK []
Sound speaker device OK []
Sending STUN request
STUN check failed
STUN check failed
STUN check failed
STUN check failed
STUN check failed
STUN check failed
Unable to contact STUN
Integration with 3CX Call Assistant is OFF
Translation file OK
Attempting to connect 198.65.166.131
Phone got as local port 3125
Plantronics not connected
Jabra not connected
Yealink not connected
RTP engine OK
SIP engine OK
Sound mic device OK []
Sound ring device OK []
Sound speaker device OK []
Sending STUN request
Not connected: Authentication failed
Phone has been disconnected - error: 401
Phone is no longer connected
Phone connection failed, PBX not responding
Integration with 3CX Call Assistant is OFF
Translation file OK
Attempting to connect 198.65.166.131
Phone got as local port 3129
Plantronics not connected
Jabra not connected
Yealink not connected
RTP engine OK
SIP engine OK
Sound mic device OK []
Sound ring device OK []
Sound speaker device OK []
Sending STUN request
Not connected: Authentication failed
Phone has been disconnected - error: 401
Phone is no longer connected
Integration with 3CX Call Assistant is OFF
Translation file OK
Attempting to connect 198.65.166.131
Phone got as local port 3135
Plantronics not connected
Jabra not connected
Yealink not connected
RTP engine OK
SIP engine OK
Sound mic device OK []
Sound ring device OK []
Sound speaker device OK []
Sending STUN request
Not connected: Authentication failed
Phone has been disconnected - error: 401
Phone is no longer connected
Phone connection failed, PBX not responding
Integration with 3CX Call Assistant is OFF
Translation file OK
Attempting to connect 198.65.166.131
Phone got as local port 3140
Plantronics not connected
Jabra not connected
Yealink not connected
RTP engine OK
SIP engine OK
Sound mic device OK []
Sound ring device OK []
Sound speaker device OK []
Sending STUN request
STUN check failed
STUN check failed
STUN check failed
STUN check failed
STUN check failed
STUN check failed
Unable to contact STUN
Integration with 3CX Call Assistant is OFF
Translation file OK
Attempting to connect 198.65.166.131
Phone got as local port 3144
Plantronics not connected
Jabra not connected
Yealink not connected
RTP engine OK
SIP engine OK
Sound mic device OK []
Sound ring device OK []
Sound speaker device OK []
Sending STUN request
STUN check failed
STUN check failed
STUN check failed
STUN check failed
STUN check failed
STUN check failed
Unable to contact STUN

 

[davidbenwell]

Hi, just checked our 3CX system and we are now seeing stun timeout, will let 3CX support know and hope they fix it.

 

[genmail]

Thanks. After several more failed attempts this am, was able to get 3cxphone to connect, but am concerned about recurrence of prob.