* KbdInteractiveAuthentication: disable keyboard interactive-auth, since
we solely rely on the SSH key for connection.
* PermitEmptyPasswords: disable empty passwords for SSH connection, again,
since we use SSH keys.
* Protocol: Explicitly set the SSH protocol to 2, even though it is the
default value.
* MaxAuthTries: Set auth tries to 3. This is to allow up to 3 keys to try
connection.
* ChallengeResponseAuthentication: We do not require a challenge-response
setup.
* AllowTcpForwarding: Allows access to locally-running ports without having
to expose them. Since all auth methods are disabled, we can enable this.
Signed-off-by: Chinmay D. Pai <chinmaydpai@gmail.com>
