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why can I see the mqtt traffic only in the info column? (same for http)

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Hello, I am writting my thesis and I connected a Raspberry Pi via Hotspot to my laptop.

I want to caputre the mqtt traffic for the Raspberry Pi. It works but I only can see the MQTT traffic in the info column. Why is it no own Protocol in the protocol column?

I would really appreciate it, if someone can help me.

Best regards

Mari1234's avatar
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Mari1234
asked 2018-03-06 11:53:26 +0000, updated 2018-03-06 11:56:30 +0000
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What ports is your traffic running on, and what ports have you configured in wireshark for MQTT and HTTP?

Can you share a capture file with a public link, e.g. CloudShark, Google Drive, DropBox etc?

grahamb's avatar grahamb (2018-03-06 12:24:20 +0000) edit
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I am completely new in wireshark.

https://www.dropbox.com/s/yvqqkktjqfm...

This ist the link for the captured traffic. In the info column is mqtt but I want it in the protocol column. I don't know where I can fix the right filter. And the mqtt port is 8883.

Thank you for the fast answer.

Mari1234's avatar Mari1234 (2018-03-06 12:32:53 +0000) edit
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1 Answer

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It looks like you're running MQTT encrypted inside TLS (SSL). I guess the TLS Application data (e.g. frame 145) contains your MQTT messages. However only encrypted.

=> To be able to see the MQTT payload you have to be able to decrypt the TLS session (e.g. by having the session key or the RSA key).

Uli's avatar
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Uli
answered 2018-03-06 12:55:27 +0000
cmaynard's avatar
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cmaynard
updated 2018-04-06 13:46:51 +0000
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