nginx: client address headers only from $remote_addr (realip). X-Forwarded-For was appended to and CF-Connecting-IP passed through from the client, so a request reaching the origin without Cloudflare (DNS-only host or the bare IP) chose the address the service bans and rate-limits by

ddiff --git a/deploy/nginx/openvibe.vip.conf b/deploy/nginx/openvibe.vip.conf
iindex 9abe00c..4217400 100644
---- a/deploy/nginx/openvibe.vip.conf
++++ b/deploy/nginx/openvibe.vip.conf
@@@ -70,8 +70,9 @@ server {
  
      proxy_http_version 1.1;
      proxy_set_header Host              $host;
--    proxy_set_header X-Real-IP         $remote_addr;
--    proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
++    proxy_set_header X-Real-IP $remote_addr;
++    proxy_set_header X-Forwarded-For $remote_addr;
++    proxy_set_header CF-Connecting-IP $remote_addr;
      proxy_set_header X-Forwarded-Proto $scheme;
  
      # ── Never public ────────────────────────────────────────
@@@ -99,7 +100,9 @@ server {
      location / {
          limit_req zone=ovvip_forms burst=20 nodelay;
          proxy_pass http://127.0.0.1:4620;
--        proxy_set_header CF-Connecting-IP $http_cf_connecting_ip;
++        proxy_set_header X-Real-IP $remote_addr;
++        proxy_set_header X-Forwarded-For $remote_addr;
++        proxy_set_header CF-Connecting-IP $remote_addr;
      }
  
      location ~ /\.(?!well-known) {