Stop hotlinking from outside domains by using .htaccess

You can stop the hotlinking from outsider domain by using following rule in .htaccess

RewriteEngine On
RewriteCond %{HTTP_REFERER} ^http://(.+.)?domain.com/ [NC,OR]
RewriteCond %{HTTP_REFERER} ^http://(.+.)?domain1.com/ [NC,OR]
RewriteCond %{HTTP_REFERER} ^http://(.+.)?domain2.com/ [NC]
RewriteRule .*.(jpe?g|gif|bmp|png)$ /images/nohotlink.jpe [L]

You can also display a 403 Forbidden Error page instead of an image (nohotlink.jpe)

Replace last line on above code with the following code

RewriteRule .*.(jpe?g|gif|bmp|png)$ – [F]