3CX webhook returning Code 500 - Internal Error when receiving SMS from Telnyx

[Connextek]

Hi there,

3CX version: 18.0 Update 4 (Build 955)

We've been having an issue with out 3CX PBX since a few weeks when receiving SMS from external numbers, using Telnyx trunks. Outbound SMS using the same Telnyx trunk/number works fine, but anything inbound fails. Below are the payload and the response header (I edited it replacing some confidential Infos with ****

PAYLOAD:
{
"autoresponse_type": null,
"cc": [],
"completed_at": null,
"cost": null,
"direction": "inbound",
"encoding": "GSM-7",
"errors": [],
"from": {
"carrier": "Bell & Virgin",
"line_type": "Wireless",
"phone_number": "+1514718****"
},
"id": "57bf8aa0-6def-4693-b735-86cc1ab69c85",
"media": [],
"messaging_profile_id": "40017755-4cf3-4552-854d-93d543794287",
"organization_id": "2830ab1c-0d41-43d0-b4e7-fafddbc2f9a3",
"parts": 1,
"received_at": "2023-02-24T13:03:58.601+00:00",
"record_type": "message",
"sent_at": null,
"subject": "",
"tags": [
"Co*****ek"
],
"text": "this is a test",
"to": [
{
"carrier": "Telnyx",
"line_type": "Wireless",
"phone_number": "+1438803****",
"status": "webhook_delivered"
}
],
"type": "SMS",
"valid_until": null,
"webhook_failover_url": null,
"webhook_url": "https://messaging.3cx.com/v3/webhook/5DXCC-CGMG2-LOQTY-74PJ1-W175K/telnyx/sms/gpnkk**********"
}

REPONSE HEADER:

• date: Fri, 24 Feb 2023 13:03:59 GMT
• content-type: text/plain; charset=utf-8
• content-length: 21
• connection: keep-alive
• content-security-policy: default-src 'self';base-uri 'self';block-all-mixed-content;font-src 'self' https: data:;frame-ancestors 'self';img-src 'self' data:;object-src 'none';script-src 'self';script-src-attr 'none';style-src 'self' https: 'unsafe-inline';upgrade-insecure-requests
• x-dns-prefetch-control: off
• expect-ct: max-age=0
• x-frame-options: SAMEORIGIN
• strict-transport-security: max-age=15552000; includeSubDomains
• x-download-options: noopen
• x-content-type-options: nosniff
• x-permitted-cross-domain-policies: none
• referrer-policy: no-referrer
• x-xss-protection: 0
• access-control-allow-origin: messaging.3cx.com
• vary: Origin
• access-control-allow-credentials: true
• etag: W/"15-/6VXivhc2MKdLfIkLcUE47K6aH0"
• x-cloud-trace-context: d59128f0b3ab12e0e1d8c9a58859247a
• cf-cache-status: DYNAMIC
• set-cookie: __cf_bm=7IyJ0rD5dx5tH6DBjeX2uDWvzuiI1Vly.LA_2IAnwyA-1677243839-0-Af7NoRUOLI5AcrcWItEP5WIkFwHi3fupwy/nkFIWGL8GprmzUympWyhosQ1mLOrIP1io6oyResEj299z6dH+bGs=; path=/; expires=Fri, 24-Feb-23 13:33:59 GMT; domain=.3cx.com; HttpOnly; Secure; SameSite=None
• server: cloudflare
• cf-ray: 79e867889b8d3adb-IAD

Other details:

• When testing the messaging setup within 3CX, it fails with the following error : The connection was refused. Please run a firewall check to identify the issue. Messages cannot be received until this issue is resolved.
• Strange enough , all firewall tests are successful, and as a troubleshooting step we forwarded all ports to our PBX and removed any firewall rules that would be causing issues.

Are the more in details logs that we could get from 3CX somewhere that would give more details as of why the test fails ?

Thank you

 

[Evolute IT]

Your Webhook URL will not work anymore. The messaging proxy has been taken down.

You should have reconfigured your SMS via the trunk directly instead.

 

[Connextek]

Hi,

We actually tried that way but when we configure the SMS via the trunk we don't have any options listed in the user extension in "Can send SMS via". Are we supposed to have an outbound rule even though we don't want to make calls out of this trunk but only SMS?

Trunk settings



Extension settings



Inbound route (not needed for SMS I guess ?)

 

[Connextek]

So, basically, the only numbers we can assign to extensions from the "Can send via" option are the numbers configured in the Routes from the "Messaging" --> "Facebook & SMS" trunks.

 

[Evolute IT]

https://www.3cx.com/docs/manual/sip-trunks/#h.uphdz78dxdph

 

[Connextek]

We are running 3CX 18.0 Update 4 (Build 955), these options are not available

3CX Desktop or web clients only shows the following. Does it mean SMS are not working anymore on 18.0 update 4 ?

 

[Evolute IT]

Why are you still on U4?

Upgrade to U6 and you will see them. Then, read this: https://www.3cx.com/blog/docs/sms-configuration/

 

[Connextek]

WIll be updating to U6 and try that again. Thank you kind sir !