map $http_user_agent $baduseragents {
                default                                                     0;
                "~Trident/[1-7]\."                                          1;
                "~Chrome/(([1-9]{1})|([0-7]{1}[0-9]{1})|(7[0-9]{1}))\."     1;
                "~YaBrowser/(([1-9]{1})|([1-9]{1}[0-8]{1}))\."              1;
                "~Firefox/(([1-9]{1})|([0-7]{1}[0-9]{1})|(8[0-9]{1}))\."    1;
                "~EdgA?/(([1-9]{1})|([0-7]{1}[0-9]{1})|(8[0-6]{1}))\."      1;
                "~Version/(([1-9]{1})|([1-9]{1}[0-1]{1}))\."                1;
        }