I've had a Pi-Hole set up for a few weeks for general network wide ad and tracker blocking. (Good fun, seems to work as advertised).
Noticed a lot of overnight activity from a Chromebook, hundreds of NXDOMAIN queries that look like a random string with my .mydomain i.e. abcdefghi.hinvest
I know just enough networking stuff to be dangerous, can anyone explain what these queries are? I guess the Chromebook was left awake overnight?
16,000+ queries between 0000 and ~0600hrs.