diff --git a/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl b/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl
index efe296422..b01cd0277 100644
--- a/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl
+++ b/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl
@@ -263,7 +263,7 @@ http {
             proxy_set_header X-Original-URI $request_uri;
             proxy_set_header X-Scheme       $pass_access_scheme;
             {{ end }}
-            proxy_set_header            Host $host;
+            proxy_set_header            Host $http_host;
             proxy_pass_request_headers  on;
             set $target {{ $location.ExternalAuth.URL }};
             proxy_pass $target;
@@ -314,7 +314,7 @@ http {
 
             client_max_body_size                    "{{ $location.Proxy.BodySize }}";
 
-            proxy_set_header Host                   $host;
+            proxy_set_header Host                   $http_host;
 
             # Pass the extracted client certificate to the backend
             {{ if not (empty $location.CertificateAuth.AuthSSLCert.CAFileName) }}
@@ -329,7 +329,7 @@ http {
             proxy_set_header                        Connection        $connection_upgrade;
 
             proxy_set_header X-Forwarded-For        $proxy_add_x_forwarded_for;
-            proxy_set_header X-Forwarded-Host       $host;
+            proxy_set_header X-Forwarded-Host       $http_host;
             proxy_set_header X-Forwarded-Port       $pass_port;
             proxy_set_header X-Forwarded-Proto      $pass_access_scheme;
             proxy_set_header X-Original-URI         $request_uri;