Redirect on deny | htaccess
Setup a script to handle 403 errors by adding this line to your .htaccess:
ErrorDocument 403 /forbidden.php
Then handle the redirect in the script:
<?php
header('Location: http://google.com');
Or to keep it all in .htaccess you could do:
RewriteEngine On
RewriteCond %{REMOTE_ADDR} 127.0.0.1
RewriteRule (.*) http://google.com [R]
Simple solution using only htaccess
ErrorDocument 403 https:///google.com
Order Allow,Deny
Allow from 127.0.0.0/8
Allow from x.x.x.x
Allow from y.y.y.y