diff --git a/user/security-in-qubes/firewall.md b/user/security-in-qubes/firewall.md
index 8d3efdb9..3cb7c42b 100644
--- a/user/security-in-qubes/firewall.md
+++ b/user/security-in-qubes/firewall.md
@@ -11,6 +11,12 @@ ref: 166
 title: Firewall
 ---
 
+Introduction
+----------------------------------
+This page explains use of the firewall in Qubes 4.2, using `nftables`.  
+In Qubes 4.1, all firewall components used `iptables`. For details of that usage see [here](../firewall_4.1/)
+
+
 Understanding firewalling in Qubes
 ----------------------------------