1. I put this rule into htaccess file to deny empty referers which is returning 403

   SetEnvIfNoCase Referer "^$  " bad_user   Deny from env=bad_user 

   I can see the log, it’s denying also Googlebot which is acting as empty referrer also. Is there a way to modify the rule to allow access Googlebot and deny all the rest empty referrers?

2. I have blocked one referrer www.example.com using

   RewriteCond %{HTTP_REFERER} example\.com [NC]   RewriteRule .* - [F] 

   working well, returning 403, but if he is referring from example.com/another_page?

So I did this:

RewriteCond %{HTTP_REFERER} example\.com [NC,OR]   RewriteCond %{HTTP_REFERER} example/another_page\.com/  RewriteRule .* - [F] 

is it correct?