diff --git a/example.cfg b/example.cfg
index 5abf12a..d1e0d88 100644
--- a/example.cfg
+++ b/example.cfg
@@ -96,6 +96,10 @@ listen:
 #               that target.
 #   
 # You can specify several of 'regex' and 'tls'.
+#
+# If you want to filter on incoming IP addresses, you can
+# use libwrap which will use /etc/hosts.allow and
+# /etc/hosts.deny.
  
 protocols:
 (