You can also do something different if you don't want to outright deny the visitors content.
This allows you to send the public to another site, while allowing your own IP addresses to view a site in development or such:
<IfModule mod_rewrite.c>
RewriteEngine On
###### Allow Private Visitors ##########################
RewriteCond %{REMOTE_ADDR} !123.456.789.0 [NC]
RewriteCond %{REMOTE_ADDR} !123.456.789.1 [NC]
###### If Not Authorized, Send People Away #######################
RewriteRule ^(.*)$ https://someotherdomain.com/$1 [L,R=301]
</IfModule>
@G J Piper
That sounds interesting, but maybe not for this topic, but I will write here, because for me is in relation.
We have one old cakephp site, and at this moment we developing another site in .net to change it.
We will need that old php site. Not all, just site.com/admin part.
So at one moment, all other sites including homepage need to be redirected to that /admin page.
I'm wondering, if I use that rewrite rule, I would have problem with redirection loop?