Sonicwall ATT WiFi Calling Fix
LAN to WAN
Source Port: Any
Destination Port/Group:
Service:
Service:
Source Object Any
Destination Object Any
Set UDP connection timeout to 200 seconds
https://www.att.com/support/article/wireless/KM1114459/
https://www.sonicwall.com/support/knowledge-base/unable-to-call-via-apple-wifi-calling/170505913456806/
As per the issue description, I understand that you are facing the issue, only with iPhones. Can you please try the below and test?
• Please follow the steps suggested under: https://www.sonicwall.com/support/knowledge-base/unable-to-call-via-apple-wifi-calling/170505913456806/ . If you are still facing the issue, then try the suggestion below.
• Can you please try creating an access rule from LAN to WAN with service-IKE and increased the UDP Inactivity timeout to 300 seconds? (Even if this resolves the issue, please get in touch with technical support and ask if keeping it at 300 seconds is fine or there is a lower recommended value).