Ok it seems someone figured out. I'm not getting any signal anymore.
On second tough that number we kept worked as an ID from the global item registry.
http://auno.org/ao/db.php?id=215091
However...
First my website sent a massive amount of coded data. Then it received some more.
http://www.the-kindred.info/error/intrusion/
What's that ? A creepy view of the source ?
Whatever the whole thing made little sense, but my brother will stop annoying me with this now.