diff --git a/manifests/firewall/iptables.pp b/manifests/firewall/iptables.pp
index cf4a19d..4b4cb6b 100644
--- a/manifests/firewall/iptables.pp
+++ b/manifests/firewall/iptables.pp
@@ -8,6 +8,8 @@ class confdroid_nrpe::firewall::iptables (
 
 ) inherits confdroid_nrpe::params {
   if $ne_incl_fw == true {
+    { notify { "nagios_source is set to ${nagios_source}": }
+
     firewall { "${ne_fw_order_no}${ne_nrpe_port} port ${ne_nrpe_port}":
       source => $nagios_source,
       proto  => 'tcp',