server.modules = (
                   *
                   *
                   *
                   *
                   "mod_auth",
                 )

***********************************************************

auth.backend = "plain"
auth.backend.plain.userfile = "/etc/lighttpd/lighttpd.users"
auth.require = ( "10.152.1.105" =>
( "method"   => "basic",
  "realm"    => "Authorised Users Only",
  "require"  => "user=RobotUser"
))