No internet under Ubuntu 22.04 after booting into Windows 10

[Ralf Mardorf]

On Sun, 2022-12-18 at 14:53 +0100, Liam Proven wrote:
> Check that the router's firmware is current?

Updates might happen automatically.

A few seconds ago I've taken a look at my O2 HomeBox 6641 and couldn't
find an option to update anymore, hence I googled for a firmware update,
for the router and telephone thingy, maybe it's possible by USB. I found
O2 forum threads mentioning that the updates happen automatically and
that some users lost call forwarding settings each time the update
happens. That might explain why calling line identity restriction
changed without prior notice.

Seemingly my router was updated from an ancient version from the days
before UNIX time with a super modern hardened O2 patch :D.