REDIRECT UNWANTED REQUESTS WITH NGINX

$ # a quick way to redirect requests from unwanted locations back
$ # to those locations.  In nginx config:
$ grep -A16 /etc/nginx/sites-enabled/00-default
map $http_referer $unwanted_referrer {
  ~bit\.ly 1;
  ~facebook\.com 1;
  ~fb\.me 1;
  ~instagram\.com 1;
  ~is\.gd 1;
  ~news\.ycombinator\.com 1;
  ~reddit\.com 1;
  ~threads\.net 1;
  ~twitter\.com 1;
  ~t\.co 1;

  default 0;
}

if ($unwanted_referrer) { return 302 $http_referer; }

[gemini://michaelnordmeyer.com/gemlog/2024-02-26-enemy-at-the-gate.gmi]