diff --git a/iptables/defaults/main.yml b/iptables/defaults/main.yml
index b569ae84..1adb1863 100644
--- a/iptables/defaults/main.yml
+++ b/iptables/defaults/main.yml
@@ -40,3 +40,6 @@
 
 #iptables_default_policy: REJECT
 iptables_default_policy: ACCEPT
+ganglia_enabled: False
+nagios_enabled: False
+
diff --git a/iptables/templates/iptables-rules.v4.j2 b/iptables/templates/iptables-rules.v4.j2
index 9d970de4..477190c5 100644
--- a/iptables/templates/iptables-rules.v4.j2
+++ b/iptables/templates/iptables-rules.v4.j2
@@ -133,6 +133,7 @@
 {% endif %}
 {% endif %}
 
+{% if nagios_enabled %}
 {% if nagios_monitoring_server_ip is defined %}
 {% for ip in nagios_monitoring_server_ip %}
 # Nagios NRPE
@@ -141,6 +142,7 @@
 -A INPUT -s {{ ip }} -p udp -m udp --dport 123 -j ACCEPT
 {% endfor %}
 {% endif %}
+{% endif %}
 
 {% if munin_server is defined and configure_munin is defined and configure_munin %}
 {% for ip in munin_server %}
@@ -149,6 +151,7 @@
 {% endfor %}
 {% endif %}
 
+{% if ganglia_enabled %}
 {% if ganglia_gmond_cluster_port is defined %}
 # Ganglia
 {% if ganglia_gmond_use_jmxtrans is not defined or not ganglia_gmond_use_jmxtrans %}
@@ -160,6 +163,7 @@
 -A INPUT -m state --state NEW -s {{ ganglia_gmetad_host }} -p tcp -m tcp --dport {{ ganglia_gmond_cluster_port }} -j ACCEPT
 -A INPUT -s {{ ganglia_gmetad_host }} -p udp -m udp --dport {{ ganglia_gmond_cluster_port }}  -j ACCEPT
 {% endif %}
+{% endif %}
 
 {% if postfix_relay_server is defined and postfix_relay_server %}
 #