Library /sys$common/syshlp/nclhelp.hlb set, x25_server, security_nodes, nodes  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Default: No node       Value: Set of fullnames
    names

    DNS full names of accessing systems, or the wildcard full name.
    Note, when managing entities on an OpenVMS system, this name must
    be a Phase IV node name.