diff --git a/common/devstack/net-fix.sh b/common/devstack/net-fix.sh
new file mode 100755
index 0000000..5b486bd
--- /dev/null
+++ b/common/devstack/net-fix.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+PRIMARY=$( route | grep default | awk '{print $NF}' )
+RULE="POSTROUTING -t nat -o $PRIMARY -s 172.24.4.0/24 -j MASQUERADE"
+
+iptables -C $RULE || iptables -A $RULE