diff --git a/conntrackt/templates/conntrackt/entity_iptables.html b/conntrackt/templates/conntrackt/entity_iptables.html
--- a/conntrackt/templates/conntrackt/entity_iptables.html
+++ b/conntrackt/templates/conntrackt/entity_iptables.html
@@ -1,3 +1,4 @@
+{% load conntrackt %}
 # iptables rules generated by conntrackt for {{entity}}
 *filter
 :INPUT ACCEPT [0:0]
@@ -9,7 +10,7 @@
 # {{communication.description}}
       {% endif %}
     {% endifchanged %}
-iptables -A INPUT -s {{communication.source.address}}/{{communication.source.netmask}} -p {{communication.protocol|lower}} -m {{communication.protocol|lower}} --dport {{communication.port}} -j ACCEPT
+{% iptables communication %}
   {% endfor %}
 {% endfor %}
 :FORWARD ACCEPT [0:0]