> ssh -o StrictHostKeyChecking=no ans-host01.lxd
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@       WARNING: POSSIBLE DNS SPOOFING DETECTED!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
The ECDSA host key for ans-host01.lxd has changed,
and the key for the corresponding IP address 10.4.108.236
is unknown. This could either mean that
DNS SPOOFING is happening or the IP address for the host
and its host key have changed at the same time.
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ECDSA key sent by the remote host is
SHA256:xUBG3IPMZZ5Fd1Dbqs8v8lM/wc6zmABNq9wxEthVtcM.
Please contact your system administrator.
Add correct host key in /home/mario/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/mario/.ssh/known_hosts:488
  remove with:
  ssh-keygen -f "/home/mario/.ssh/known_hosts" -R "ans-host01.lxd"
Password authentication is disabled to avoid man-in-the-middle attacks.
Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks.
mario@ans-host01.lxd: Permission denied (publickey).