diff --git a/opencontrail/control/analytics.yml b/opencontrail/control/analytics.yml
index 8cbd166..8065742 100644
--- a/opencontrail/control/analytics.yml
+++ b/opencontrail/control/analytics.yml
@@ -14,6 +14,9 @@
         python-kafka:
           version: 1.0.1-0contrail1
           hold: true
+      kernel:
+        modules:
+        - nf_conntrack_ipv4
   opencontrail:
     common:
       identity:
diff --git a/opencontrail/control/cluster.yml b/opencontrail/control/cluster.yml
index 7e30779..a4126d6 100644
--- a/opencontrail/control/cluster.yml
+++ b/opencontrail/control/cluster.yml
@@ -13,6 +13,9 @@
           version: 0.9.0-0contrail0
         python-kafka:
           version: 1.0.1-0contrail1
+      kernel:
+        modules:
+        - nf_conntrack_ipv4
   opencontrail:
     web:
       database:
diff --git a/opencontrail/control/control.yml b/opencontrail/control/control.yml
index 9c1d905..fdc4f7d 100644
--- a/opencontrail/control/control.yml
+++ b/opencontrail/control/control.yml
@@ -38,3 +38,8 @@
         port: 9042
       network:
         host: ${_param:cluster_vip_address}
+  linux:
+    system:
+      kernel:
+        modules:
+        - nf_conntrack_ipv4
diff --git a/opencontrail/control/single.yml b/opencontrail/control/single.yml
index efdc267..064418e 100644
--- a/opencontrail/control/single.yml
+++ b/opencontrail/control/single.yml
@@ -12,6 +12,9 @@
           version: 1.0.1-0contrail1
         contrail-api-cli:
           version: latest
+      kernel:
+        modules:
+        - nf_conntrack_ipv4
   haproxy:
     proxy:
       listen: