I'll try and keep this simple, basically I mount a .iso image to a directory within my root directory as defined in httpd.conf. Using the command

mount -o ro,loop cdimage.iso directory

However before this mount the directory is accessable (tho empty) but after it I become unable to access the directory anymore with a 403 - permission denied. I am mainly interested in this as an easy way to host CD images for creating Xen VMs. Anybody got any idea why the permissions on the directory change after the mount and how to stop it occuring?

P.S. opps, posted this in the wrong section, could a moderator be nice and move this for me :X.

Check permissions on the directory after the images is mounted on it. If the process that Apache runs as cannot read the directory or it's contents, you won't be able to access them through httpd.