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50.2.3. Managing NFS Home Directories

In Red Hat Enterprise Linux 5, most targeted daemons do not interact with user data and are not affected by NFS-mounted home directories. One exception is the Apache HTTP Server. For example, CGI scripts that are on the mounted file system have the nfs_t type, which is not a type that httpd_t is allowed to execute.
If you are having problems with the default type of nfs_t, try mounting the home directories with a different context:
mount -t nfs -o context=user_u:object_r:user_home_dir_t \
	fileserver.example.com:/shared/homes/ /home

Warning

Section 50.2.9, “Specifying the Security Context of Entire File Systems” explains how to mount a directory so that httpd can execute scripts. If you do this for user home directories, it gives the Apache HTTP Server increased access to those directories. Remember that a mountpoint label applies to the entire mounted file system.
Future versions of the SELinux policy address the functionality of NFS.