Permanently added hostkeys (due to IP address pool), without confirmation

[Steffen Nurpmeso]

Damien Miller <djm at mindrot.org> wrote:
 |On Fri, 9 Oct 2015, Steffen Nurpmeso wrote:

 |You have CheckHostIP enabled (it is on by default) and some DNS server
 |or hosts file is returning 104.46.105.89 for that hostname. When ssh
 |connects to 104.46.105.89, it is offering the same key as you have
 |already learned for 52.21.36.51, so it is automatically added to
 |known_hosts.
 |
 |See ssh_config's entry on CheckHostIP for a few more details.

Yes (through default).  Ok that explains the missing confirmation.
It's pretty clear from the manual, thank you.

--steffen