Redhat – Apache throwing 403 on serving images from an NFS share

apache-2.2nfsredhatrhel5

I'm repeatedly getting 403 Permission Denied errors on trying to serve images from apache running on Machine A. The images are in a directory which is an NFS share from Machine B.
The entry on Machine B /etc/exports reads like this :
/dir/ xxx.xxx.xxx.xxx(rw,sync,no_root_squash)

I'm able to browse the NFS mounted files/directories on Machine A successfully.

After going through httpd.conf, I also uncommented the options EnableMMAP off and EnableSendFile Off as written there.

Both machines are on RHEL5.

Best Answer

Finally resolved this. It had been an SELinux issue all along. Found the solution here - http://www.redhat.com/docs/manuals/enterprise/RHEL-4-Manual/selinux-guide/rhlcommon-section-0068.html

In Red Hat Enterprise Linux 4 most targeted daemons do not interact with user data and are not affected by NFS-mounted home directories. One exception is Apache HTTP. For example, CGI scripts that are on the mounted file system have the nfs_t type, which is not a type httpd_t is allowed to execute.

Setting SELinux to permissive on the relevant servers did the job for me.

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