mqtt protocol not recognized [closed]

asked 2018-10-04 12:41:26 +0000

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Hello there.

I have a connection between a mqtt broker and a client on the standard port 1883. The communication is visible in wireshark. IP,TCP is shown but mqtt is not recognized.

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Closed for the following reason the question is answered, right answer was accepted by nr54321
close date 2018-10-08 06:25:49.421302


What version of Wireshark are you running? Can you provide Help -> About Wireshark details?

Without knowing anything more, I might suggest that you check the MQTT protocol preferences (Edit -> Preferences -> Protocols -> MQTT) to be sure the MQTT TCP port is set to 1883. You could also check to make sure the MQTT dissector is enabled: Analyze -> Enabled Protocols... -> MQTT.

cmaynard gravatar imagecmaynard ( 2018-10-04 13:36:19 +0000 )edit


thanks for replying.

The version is 2.6.3, the MQTT Port ist set to 1883 and the dissector is enabled for mqtt.

nr54321 gravatar imagenr54321 ( 2018-10-04 14:53:18 +0000 )edit

Ok. I tested an other broker and it works there. Might be a problem with the broker.

nr54321 gravatar imagenr54321 ( 2018-10-04 14:57:06 +0000 )edit