We just installed windows server 2012 and IIS 8.5.
Every thing was OK, but from 3 days ago we have a problem with PNG files, our web sites can't display PNG file if they were in some nested folders.
e.g:
if a SomeImage.png file is in website root, we can see it in browser, but if we move it in a path likeroot > folder1 > folder2 > folder3 browser can't display it and just
icon will display.
We could resolve this problem with changing Identity of Application pool from ApplicationPoolIdentity to LocalSystem. but as I read LocalSystem can be a security risk.
How can we resolve this problem ?
P.S:
When the site's application pool was ApplicationPoolIdentity, IUSR and IIS_IUSR and NetworkService has FullControl on site.