[atlas] probe offline - troubleshooting requested

Last night my probe (#29384) was declared offline after the daily
Internet disconnection my FritzBox executes to keep the provider from
disconnecting me after 24 hours online. According to the SOS history
the probe gets DNS requests out but somehow fails to connect
completely. I tried rebooting every network component i could locally
get my hands on but that didn't seem to help much. The LEDs on the
probe don't actually fit any of the descriptions from the FAQ: They
are On, Off, fast(er) blink (at least if compared to shortly after
booting (Network Test?), On, On. I'm guessing it means the network
somehow managed to fail. Although I don't notice anything missing from
what I did on the network this morning.

Any ideas what I could try to get the probe reconnected?

Just to be complete: Here are the last lines of the SOS history:
62.109.121.35 2016-10-18 05:43:27 A 3h 59m
62.109.121.35 2016-10-18 05:43:27 AAAA 3h 59m

TIA,
Andre,
currently not in reach of the probe