--- overleaf.conf
+++ overleaf.conf
@@ -67,6 +67,16 @@ server {
 		proxy_http_version 1.1;
   }

+  # block external access to metrics
+  location ~* ^/metrics/?$ {
+    return 404 'Not found';
+  }
+
+  # block external access to all health checks /health_check, /health_check/full, etc
+  location ~* ^/health_check {
+    return 404 'Not found';
+  }
+
   # Load any extra configuration for this vhost
   include /etc/nginx/vhost-extras/overleaf/*.conf;
 }
