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

 o  nodes

    Default: No node names          Value: Set of full-name

    DNS full names of accessing systems, or the wildcard full name.

 o  rights identifiers

    Default: No rights identifiers     Value: Set of simple names

    Set of rights identifiers to be associated with the set of nodes
    named in the nodes characteristic for purposes of access control
    to DTE classes at the gateway node.