map $http_referer $bad_referer {
    hostnames;

    default                           0;

    # Black list domain
    "~zhujiceping.com"             1;
  "~v2ex.com"             1;
  "~hostloc.com"             1;
  "~zhihu.com"             1;
  "~affyun.com"             1;
  "~t.cn"             1;
}

if ($bad_referer) {
  rewrite ^(.*)$  https://$host/paolu.html permanent;
}