# MQTT Engine not connecting to MQTT Distributor after Ignition gateway restart

**URL:** <https://forum.cirrus-link.com/t/mqtt-engine-not-connecting-to-mqtt-distributor-after-ignition-gateway-restart/717>\
**Category:** MQTT Modules\
**Created:** [March 13, 2025, 2:06pm UTC](https://forum.cirrus-link.com/t/mqtt-engine-not-connecting-to-mqtt-distributor-after-ignition-gateway-restart/717 "2025-03-13T14:06:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![biri](https://avatars.discourse-cdn.com/v4/letter/b/a3d4f5/32.png) [@biri](https://forum.cirrus-link.com/u/biri)\
**Post date:** [March 13, 2025, 2:06pm UTC](https://forum.cirrus-link.com/t/mqtt-engine-not-connecting-to-mqtt-distributor-after-ignition-gateway-restart/717/1 "2025-03-13T14:06:14Z")

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Hi,

I am using the latest version of ignition and MQTT modules.

When I restart my ignition gateway, the MQTT Engine status stays not connected, until I edit the MQTT server settings and click save WITHOUT making any changes.

I am using self-signed SSL certificate.

While it is not connecting, the logs show: Error while accepting secure connection from /{URL}: Received fatal alert: certificate\_unknown

Again, If I just click save without changing anything in the MQTT server setting in the MQTT module, the connection is established.

I would like to know why this happens, and what is a possible solution?  
Thanks

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**Author:** ![mhasan](https://avatars.discourse-cdn.com/v4/letter/m/a87d85/32.png) [@mhasan](https://forum.cirrus-link.com/u/mhasan)\
**Post date:** [September 15, 2026, 6:56pm UTC](https://forum.cirrus-link.com/t/mqtt-engine-not-connecting-to-mqtt-distributor-after-ignition-gateway-restart/717/2 "2026-09-15T18:56:19Z")

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Did you ever figure this out? Seems like I’m facing similar issues. (ignition 8.1, connecting to aws iot core as mqtt broker)