map $http_user_agent $agent_ok {

map "$http_user_agent:$http_referer" $referer_ok {
        "-:-" 0;
        ":" 0;
        default 1;
}

map $remote_addr $ip_ok {
        ~^47\.(79|88|91)\. 0;
        default 1;
}

map "$agent_ok$referer_ok$ip_ok" $allow_user {
        "111" 1;
        default 0;
}