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--- wiki:nginx_troubleshooting [2024/09/09 12:44] – add signature invalid info antisa
+++ wiki:nginx_troubleshooting [2026/03/18 10:17] (current) – [Headers not proxied to backend server] add test app link antisa
@@ Line 103: / Line 103: @@
   apt-key add /usr/share/keyrings/nginx-archive-keyring.gpg
-After you've added the [[https://docs.nginx.com/nginx/admin-guide/installing-nginx/installing-nginx-open-source/#installing-prebuilt-debian-packages|repo.]]
+After you've added the [[https://docs.nginx.com/nginx/admin-guide/installing-nginx/installing-nginx-open-source/#installing-a-prebuilt-debian-package-from-the-official-nginx-repository|repo.]]
 ==== Tested on ====
   * nginx/1.23.1
   * Debian 10 Buster
+===== Headers not proxied to backend server =====
+If you are setting proxy headers like:
+<code | download>
+location / {
+        proxy_pass         http://app-container:8080;
+        proxy_set_header   Host $http_host;
+        proxy_set_header   X-Https 1;
+        proxy_set_header   X-NginX-Proxy true;
+        proxy_set_header   X-Real-IP $remote_addr;
+        proxy_set_header   X-Forwarded-For $remote_addr;
+}
+</code>
+they will only be visible in the app when 200 OK code is returned. Also headers can't have underscores in them unless ''underscores_in_headers on;'' is set as well.
+Use [[wiki:test_app_printing_http_headers|this app]] to test the received headers.
 ====== See also ======