Networked File and Folder Permissions
Whatever permissions exist on the local and client systems, the actual permissions that are transmitted and available are based on those configured in the server configuration file. In Linux, three major services that network files and folders (which are really directories) are the Network File System (NFS), Samba, and the File Transfer Protocol (FTP). In fact, the file and directory permissions that you see from shared directories may be overridden by those file and directory permissions configured in those services.
NFS Issues
While three major versions of NFS are still in common use, two are inherently unsecure. NFS versions 2 and 3 do not require any sort of user authentication when a client connects ...
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