The regexp to block internal directories:
					(?<!ext/)phpbb
			 | 
		
Matches the image:
					adm/images/phpbb_logo.png
			 | 
		
Reference:
- is duplicated by
 - 
                    
PHPBB-16249 phpbb_logo.png 404 with Nginx
-         
 - Closed
 
 -         
 
The regexp to block internal directories:
					(?<!ext/)phpbb
			 | 
		
Matches the image:
					adm/images/phpbb_logo.png
			 | 
		
Reference:
            
        
        PHPBB-16249
        phpbb_logo.png 404 with Nginx