Someone

user  www-data www-data;
worker_processes  2;
events {
    worker_connections  3024;
  }
http {
    default_type  application/octet-stream;
    log_format  main  '$remote_addr - $remote_user [$time_local] $status '
                      '"$request" $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "http_x_forwarded_for"';
    sendfile        on;
    tcp_nopush     on;
    tcp_nodelay    on;
    server {
        listen       8001;
        server_name  lupus;
        access_log  /var/log/nginx/access.log  main;

        #if ($http_user_agent ~* crawler) {
        #       rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        #}
        if ($http_user_agent ~* Slurp) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* Hotbar) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* ZyBorg) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* DigExt) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* Q312461) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* FreeBSD) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* 2003) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* avastye.com) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* H010818) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* FunWebProduct) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* Navigator) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* GNUTLS) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* Microsoft-WebDAV) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* 98) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        #if ($http_user_agent ~* google) {
        #        rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        #}
        #if ( $http_user_agent = "" ) {
        #        rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        #}
        if ($http_user_agent ~* 4\.7) {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        if ($http_user_agent ~* "4.75") {
                rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        }
        #if ($http_user_agent ~* "Windows NT 5.0") { #ban win 2000
        #        rewrite  ^/(.)*$ http://bla-bla:9000/ permanent;
        #}





        #location /forum.php { deny   all;}

        location / {
            proxy_pass         http://127.0.0.1:80/;
            proxy_redirect     off;
            proxy_set_header   Host             $host;
            proxy_set_header   Remote-Addr        $remote_addr;
            client_max_body_size       10m;
            client_body_buffer_size    128k;
            proxy_connect_timeout      90;
            proxy_send_timeout         90;
            proxy_read_timeout         90;
            proxy_buffer_size          4k;
            proxy_buffers              4 32k;
            proxy_busy_buffers_size    64k;
            proxy_temp_file_write_size 64k;
        }
    }
}