diff --git a/manifests/nginx-vhost.conf b/manifests/nginx-vhost.conf
index a13095f0fa6..d4c2af17ec1 100644
--- a/manifests/nginx-vhost.conf
+++ b/manifests/nginx-vhost.conf
@@ -10,6 +10,7 @@ proxy_set_header Connection $connection_upgrade;
 
 server {
   listen %(ui_port)s;
+  server_name _;
 
   location /api/kube {
     rewrite /api/kube/(.*) /$1 break;