diff --git a/Shorewall/interfaces b/Shorewall/interfaces
index 8ac277fa7..595d49581 100644
--- a/Shorewall/interfaces
+++ b/Shorewall/interfaces
@@ -20,6 +20,8 @@
 #			an alias (e.g., eth0:0) here; see
 #			http://www.shorewall.net/FAQ.htm#faq18
 #
+#			DO NOT DEFINE THE LOOPBACK INTERFACE (lo) IN THIS FILE.
+#
 #	BROADCAST	The broadcast address for the subnetwork to which the
 #			interface belongs. For P-T-P interfaces, this
 #			column is left black.If the interface has multiple
diff --git a/Shorewall/policy b/Shorewall/policy
index 4b144d54e..6c6ba0fbe 100644
--- a/Shorewall/policy
+++ b/Shorewall/policy
@@ -17,6 +17,10 @@
 #	DEST		Destination zone. Must be the name of a zone defined
 #			in /etc/shorewall/zones, $FW or "all"
 #
+#		WARNING: Firewall->Firewall policies are not allowed; if
+#			 you have a policy where both SOURCE and DEST are $FW,
+#			 Shorewall will not start!
+#
 #	POLICY		Policy if no match from the rules file is found. Must
 #			be "ACCEPT", "DROP", "REJECT" or "CONTINUE"
 #