VMS Help TCPIP Services, Programming Interfaces, RPC Client Routines, authunix_create_default, Examples  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    1.auth_destroy(client->cl_auth)
      client->cl_auth = authunix_create_default();
      This example overrides the default authnone_create action. The
      client handle, client, is returned by the clnt_create, clnt_
      create_vers, clnttcp_create, or clntudp_create routine.