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I'm trying to decode BACnet traffic that was sent on a non-standard port. It looks like I should be able to click "decode as" and choose BACnet or BACapp, but they don't appear in the selection list. What am I missing?

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Instructions

  • Start Wireshark
  • Load or capture some BACnet packets on a non standard port
  • From the “Analyse” menu select “Decode as”
  • Select the non default BACnet IP udp port number in the drop down box.
  • Select “BVLC” from the right hand menu. Note: “BVLC” stands for “BACnet Virtual Link Control” and is the header to all BACnet IP messages.
  • Click OK

From: http://www.chipkin.com/using-wireshark-to-decode-bacnet-traffic-on-non-standard-ports/

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