diff --git a/config/firewall/rules.pl b/config/firewall/rules.pl
index 6c08feb86..7edb910e2 100644
--- a/config/firewall/rules.pl
+++ b/config/firewall/rules.pl
@@ -55,6 +55,7 @@ my @PRIVATE_NETWORKS = (
 	"172.16.0.0/12",
 	"192.168.0.0/16",
 	"100.64.0.0/10",
+	"224.0.0.0/4",
 );
 
 # MARK masks