Question about ssh without password

The sshd_config file shows as following:

#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile .ssh/authorized_keys

It looks like user cannot ssh to this server without password. However, I can do it from other AIX server to this server.

So, how to know if this server allow ssh without password? How to disable it?

Thanks

The way the ssh config file works is as delivered it should be mostly commented out and the comments indicate the default values.

So by default it should allow authentication by key

Do you really want to disable PubkeyAuthentication?

That would mean any daemons or similar software using ssh and keys would not work.

Thank you.

Just want to know how to disable it and how to know if it is enabled.