/LBXAUTHENTICATE=protocol-name (Alpha/Integrity servers only)
       /NOLBXAUTHENTICATE (Alpha/Integrity servers only)

    Specifies the authorization protocol used to grant the LBX proxy
    server access to the X display server. This qualifier is used
    with the /PROXY and /CREATE qualifiers when creating an initial
    LBX proxy server connection. If a proxy server connection already
    exists, these qualifiers are ignored. If you do not specify
    /LBXAUTHENTICATE, the authorization protocol is obtained from
    the current X authority file. If you specify /NOLBXAUTHENTICATE,
    the proxy server defaults to the X authority file of the user who
    started the proxy manager application.

    Valid values for the protocol-name parameter are MIT-MAGIC-
    COOKIE-1 and MIT-KERBEROS-5. If you supply a protocol-name value
    of MIT-MAGIC-COOKIE-1, you must also specify the value of the
    magic cookie using the /LBXDATA qualifier.