# MQTT broker confusion in OH3

**URL:** <https://community.openhab.org/t/mqtt-broker-confusion-in-oh3/110822>\
**Category:** Migration\
**Tags:** mqtt, openhab3\
**Created:** [December 22, 2020, 11:30am UTC](https://community.openhab.org/t/mqtt-broker-confusion-in-oh3/110822 "2020-12-22T11:30:40Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Qwerty\_Zet](https://community.openhab.org/user_avatar/community.openhab.org/qwerty_zet/32/60411_2.png) [@Qwerty\_Zet](https://community.openhab.org/u/Qwerty_Zet)\
**Post date:** [December 22, 2020, 6:13pm UTC](https://community.openhab.org/t/mqtt-broker-confusion-in-oh3/110822/3 "2020-12-22T18:13:07Z")

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See post nov 29.

> [@openHAB 3.0 Milestone 2 discussion](https://community.openhab.org/t/openhab-3-0-milestone-2-discussion/107564/240):
>
> In OpenHab 3 settings do you see “MQTT Broker connection”? If so, click the link. The info on this page was blocking port 1883 so Mosquitto didn’t connect. I removed all the info on this page and saved the page. Restart Openhab and Mosquitto, as port 1883 was not blocked anymore, Mosquitto could connect. Perhaps a reboot is needed.

Edit: after that, the error message in you log should be gone. Zet hem op 🙂

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