Solved Incoming SMS/MMS messages not working on 3CX v18.x

[TPR3CX]

Greetings,

We received reports of incoming SMS/MMS texting not work. Since we haven't deployed texting yet, we are not sure when the issue started. We can text out, but incoming does not work.

When I do a TEST from the main Messaging section in the admin portal, I receive the following error:

The PBX is not reachable via the Internet. Ensure that all necessary ports are open and that the firewall check is successful. The error code received is: UNABLE_TO_VERIFY_LEAF_SIGNATURE

Have there been any recent changes to the required Firewall Ports needed to be opened or is this a different issue? Is there an update document that lists what ports I should have open?

I should also add that I contacted Flowroute for help and they said that they are getting a bad request when trying to access the webhook link that is configured, pointing to

https://messaging.3cx.com/v3/webhook/.....

Thanks!

 

[TPR3CX]

FIXED IT!!!

Thanks to this thread. https://www.3cx.com/community/threads/sms-test-not-working.80036/

Apparently if you don't have the Intermediate Cert appended to your crt file, it will fail. Meanwhile, everything else works. Perhaps there should be a confirmation scan with an alert.

Thanks!

 

[NickD_3CX]

Glad you got it figured out!

Yes having the full Certificate chain is very important.

For future readers, a good way to check is using https://www.sslshopper.com/ssl-checker.html, it will tell you if there is something missing or not.