diff --git a/conf.d/00-default.conf b/conf.d/00-default.conf
new file mode 100644
index 0000000..4cd2df5
--- /dev/null
+++ b/conf.d/00-default.conf
@@ -0,0 +1,20 @@
+server {
+    listen 80 default_server;
+    listen [::]:80 default_server;
+    server_name _;
+
+    return 404;
+
+}
+
+server {
+    listen 443 ssl default_server;
+    listen [::]:443 ssl default_server;
+    server_name _;
+
+    ssl_certificate /etc/nginx/certs/default.psi.ch.crt;
+    ssl_certificate_key /etc/nginx/private/default.psi.ch.key;
+
+    return 404;
+}
+