-- sed -i '/^\s*PasswordAuthentication\s\+no/d' /etc/ssh/sshd_config
-- echo "UseDNS no" >> /etc/ssh/sshd_config
+- sed -i 's/^\s*PasswordAuthentication\s\+no/PasswordAuthentication yes/' /etc/ssh/sshd_config
+- sed -i 's/#UseDNS yes/UseDNS no/' /etc/ssh/sshd_config
+- sed -i 's/GSSAPIAuthentication yes/GSSAPIAuthentication no/' /etc/ssh/sshd_config