Enable Root Login Over SSH in FreeBSD 10.0

By default, we cannot login to FreeBSD over ssh. So, we must enable it from openSSH configuration.

Open /etc/ssh/sshd_config with your 'ee' text editor

ee /etc/ssh/sshd_config

Find this

#PermitRootLogin no

Change to

PermitRootLogin yes

Press escape, and then choose yes for save confirmation.

Finally, restart your ssh daemon

 service sshd restart

 ...and done. You can login with root remotely over ssh.

Source:
http://blog.bobbyallen.me/2011/07/22/how-to-enable-root-login-over-ssh-on-freebsd-8-2/