diff --git a/classes/cluster/k8s-ha-calico-flannel-virtlet/infra/init.yml b/classes/cluster/k8s-ha-calico-flannel-virtlet/infra/init.yml
index 3adfcb3..f3e1fdf 100644
--- a/classes/cluster/k8s-ha-calico-flannel-virtlet/infra/init.yml
+++ b/classes/cluster/k8s-ha-calico-flannel-virtlet/infra/init.yml
@@ -26,3 +26,7 @@
     system:
       name: ${_param:infra_config_hostname}
       domain: ${_param:cluster_domain}
+  openssh:
+    server:
+      alive:
+        interval: 0
diff --git a/classes/cluster/k8s-ha-calico/infra/init.yml b/classes/cluster/k8s-ha-calico/infra/init.yml
index b183cd2..fc7bd2e 100644
--- a/classes/cluster/k8s-ha-calico/infra/init.yml
+++ b/classes/cluster/k8s-ha-calico/infra/init.yml
@@ -26,3 +26,7 @@
     system:
       name: ${_param:infra_config_hostname}
       domain: ${_param:cluster_domain}
+  openssh:
+    server:
+      alive:
+        interval: 0
diff --git a/classes/system b/classes/system
index 4ab3648..e9f137f 160000
--- a/classes/system
+++ b/classes/system
@@ -1 +1 @@
-Subproject commit 4ab36482f850169df3eb3faeff4d07b6f4abe1fd
+Subproject commit e9f137f32744410573c4188791bf821835512628