Cannot connect to tshello

Tailscale version 1.32.2
Your operating system & version MacOS 13

I’m trying to integrate tailscale into our application ( using Go. As first step, I’m trying to understand what the tshello example does and ran tshello. That works, the tshello machine appears in my network.

However, testing by doing

curl http://100...

does never return on MacOS (i.e. times out). I have the tailscale client running on the Mac, so I would expect it to route to the tsnet application.

The machine isn’t available on Magic DNS either:

curl -v
* Could not resolve host:
* Closing connection 0
curl: (6) Could not resolve host:

Any idea what might we wrong?