content_image/985082.jpg
Keep the default setting and leave the check box selected, as shown in Figure 5-5. 

<img src='content_image/985082.jpg'>

## Root squash 

Enabling this option prevents root users, from the NFS client systems, from having root privileges on the NFS export that are provided by ProtecTIER. If you do not enable root squash, any root user of a remote system might delete any user data on the mounted NFS export because root can delete any data of foreign users. 

To prevent this action, the root squash  option maps the root user ID 0 (UID) and group ID 0 (GID) to a customized UID. By doing this task, the remote root user cannot delete or modify any other data than the one that is created with the customized UID. Typically, the root squash function by default maps the UID to nfsnobody , but in the ProtecTIER implementation, the UID of that user is higher than the value that you are allowed to enter in the wizard’s field. 

Alternatively, the no_root_squash  option turns off root squashing. 

