diff --git a/app/zone/knot_interface.pm b/app/zone/knot_interface.pm
new file mode 100644
index 0000000..072a58a
--- /dev/null
+++ b/app/zone/knot_interface.pm
@@ -0,0 +1,26 @@
+use v5.14;
+package app::zone::knot_interface;
+use Moose;
+
+# on suppose que tout est déjà mis à jour dans le fichier
+sub reload {
+    my ($self, $zname) = @_;
+    die "knot ns not implemented yet";
+}
+
+sub addzone {
+    die "knot primary ns not implemented yet";
+}
+
+# add a domain on a secondary ns
+sub addzone_sec {
+    my ($self, $zdir, $zname, $opt) = @_;
+    die "knot secondary ns not implemented yet";
+}
+
+sub delzone {
+    my ($self, $zdir, $zname) = @_;
+    die "knot ns not implemented yet";
+}
+
+1;