1.
In [Settings] –> [Reading]
Check “Discourage search engines from indexing this site”
2.
.htaccess
Header set X-Robots-Tag “noindex, nofollow”
3.
[Plugins] –> [Add New]
Search “My Private Site”
Install it.
Activate it.
4.
[Settings] –> [Private Site]
Section “Make Site Private”
Check “Private Site”