Motivated to watch data exchange on Bitcoin Newtwork, especially on regtest, and with hints from David Harding I decided to analyse traffic on regtest with Wireshark.

I’ve installed and setup (I’ve got a list of interfaces) Wireshark and start capturing from all interfaces available and immediately run one regtest node with following connection specification:

...
Bound to [::]:11111
Bound to 0.0.0.0:11111
...

I put a tcp.port==18444 filter (in the style of this description) and apply.

Problem: There’s no traffic shown!
Question: What am I doing wrong and what interface should I capture from?

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