diff --git a/defaults/main.yml b/defaults/main.yml
index 4077575..f2f9537 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -4,5 +4,7 @@ iptables__drop_by_default: false
 iptables__allow_output_ifaces: []
 iptables__v4_filter_prepend: null
 iptables__v4_filter_append: null
+iptables__v4_nat: null
 iptables__v6_filter_prepend: null
 iptables__v6_filter_append: null
+iptables__v6_nat: null
diff --git a/templates/rules.v4 b/templates/rules.v4
index 33186be..22666f3 100644
--- a/templates/rules.v4
+++ b/templates/rules.v4
@@ -1,3 +1,21 @@
+#####
+*nat
+#####
+
+:PREROUTING  ACCEPT [0:0]
+:INPUT       ACCEPT [0:0]
+:OUTPUT      ACCEPT [0:0]
+:POSTROUTING ACCEPT [0:0]
+
+# Remove all rules from all chains,
+# delete all user-defined chains.
+-F
+-X
+
+{{ iptables__v4_nat }}
+
+COMMIT
+
 ########
 *filter
 ########
diff --git a/templates/rules.v6 b/templates/rules.v6
index bca10ad..1eab748 100644
--- a/templates/rules.v6
+++ b/templates/rules.v6
@@ -1,3 +1,21 @@
+#####
+*nat
+#####
+
+:PREROUTING  ACCEPT [0:0]
+:INPUT       ACCEPT [0:0]
+:OUTPUT      ACCEPT [0:0]
+:POSTROUTING ACCEPT [0:0]
+
+# Remove all rules from all chains,
+# delete all user-defined chains.
+-F
+-X
+
+{{ iptables__v6_nat }}
+
+COMMIT
+
 ########
 *filter
 ########