I have the following folder in the root of my site:
Arquivos/Fotos/goto1.jpg
If I type in the browser the link with my site (www.mysite.com/Arquivos/Photos/goto1.jpg) the photo opens, and is it possible to block it? I mean let the photo only appear within the pages of my site?
Yes, it is possible!
You can try the following in .htaccess (Apache):
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^http://(www\.)?localhost [NC]
RewriteCond %{HTTP_REFERER} !^http://(www\.)?localhost.*$ [NC]
RewriteRule \.(gif|jpg)$ - [F]
You can do the same in IIS using Web.config, but I do not know how.
The example above, using Apache, has localhost as a domain, make sure you use the correct domain instead of " localhost ".