Unix authenticator for NFS
The pcnfsd utility is used for authentication purposes by NFS clients in a PC environment that has no concept of user/password identification (e.g. DOS).
There's no direct check for root on the mount. The nfsd utility checks only that the requests come from a privileged port (which implies root access). The check may be disabled using the -norsvd option in the /etc/exports file.
If a configuration file is present ( /etc/pcnfsd.conf) pcnfsd uses the information it contains to replace certain builtin elements.
/etc/exports, /etc/pcnfsd.conf, nfsd.