@niels awesome! With the window open my packets reach your Lorank8 
I can find (other) packets being received by your gateways, but the Kerlink never sends a stat update, and the Lorank8 only did a few times! I wonder if that's normal behavior for these gateways. At least it makes the Kerlink not show up maps (yet), and the Lorank8 to be "offline".
So I think this means we have 5 gateways in Leiden (in 4 distinct places). (I'm not counting that B827EBFFFF64EEA3 of mine as 6th.)