There is an error in the RHEL 8, RH124, Chapter 10, Section 1 explanation, here:
This says that it "seeks the user's confirmation on whether or not to continue with the connection." By default, it does not. Instead, it flat-out disallows the connection, as seen here (this was done an a CentOS 8 machine because I didn't want to go messing with all the SSH keys and things in the lab environment):
Notice that the output says "you have requested strict checking."
The note in the blue box says that StrictHostKeyChecking needs to be set to yes in /etc/ssh/ssh_config (or ~/.ssh/config) in order to "always abort the SSH connection." This is a semi-true statement. If it is undefined, it will also automatically abort the SSH connection as seen here - the setting in the file is, by default, commented out:
And, additionally, the man pages support this (that the default behavior is to abort the connection):
"...and ssh will refuse to connet to hosts whost host key has changed."
This one may seem a bit confusing. It boils doen to this: with no changes to the the system or default SSH settings, the connection will automatically be aborted, contrary to what the text says in the first image.
