To specify the UID and GID for remote root users, edit the /etc/exports file and add the following for each export:
anonuid=value greater than UID_MAX from /etc/login.defs
anongid=value greater than GID_MAX from /etc/login.defs
Note that a value of "-1" is technically acceptable as this will randomize the anonuid and
anongid values on a Red Hat Enterprise Linux based NFS server. While acceptable from a security perspective,
a value of -1 may cause interoperability issues, particularly with Red Hat Enterprise Linux 7 client systems.
Alternatively, functionally equivalent values of 60001, 65534, 65535 may be used.