2a) Add the following to your .htaccess file:

AuthUserFile 	/home/users/web/b701/moo.leifsegencom/sandbox/<your_user_name>/.htpasswd
AuthType Basic
AuthName /home/users/web/b701/moo.leifsegencom/sandbox/<your_user_name>/
Require valid-user

2b) Save the version of the .htaccess file on your computer and put it in your online folder again.