Updated 3cx to v20 on premise and app stopped working on LAN

[lgeorge]

Updated 3cx from 18 to 20.

Now the App stopped working, just says "Connecting"

If I turn the phones WIFI off and connect via LTE, the app connects and works.

No other network changes were made other than upgrading the on premise server from 18 to 20.

 

[Alphabetic]

Have you set up split DNS on your network so the FQDN resolves to the local IP?
https://www.3cx.com/docs/creating-fqdn-split-dns/

 

[lgeorge]

Yes, an nslookup is resolving back to our internal phone server.

 

[Gingerr6]

Remove account from the app and scan the QR code again.

 

[lgeorge]

I’ve tried that more times than I can count. Even completely deleted the app, still to no avail. Tried with is android, iPhone, etc, all act the same way. App works offsite or on LTE, doesn’t work at all connected to local lan WiFi.

 

[Alphabetic]

What DNS is your wifi giving out? Have you performed this NSLookup from the mobile device?

is the wifi network on a vlan? There's something going on in your network causing this since it works coming in from external.

 

[SteveITS]

@lgeorge Try browsing to your FQDN from the phone's web browser.

When you are adding the account via QR, are you logging in to the web client using the FQDN and HTTPS?