diff --git a/lib/nova_plugins/hypervisor-xenserver b/lib/nova_plugins/hypervisor-xenserver
index a63e72e..b053856 100644
--- a/lib/nova_plugins/hypervisor-xenserver
+++ b/lib/nova_plugins/hypervisor-xenserver
@@ -93,6 +93,15 @@
     if is_service_enabled neutron; then
         # Remove restriction on linux bridge in Dom0 when neutron is enabled
         $ssh_dom0 "rm -f /etc/modprobe.d/blacklist-bridge*"
+
+        count=`$ssh_dom0 "iptables -t filter -L XenServerDevstack |wc -l"`
+        if [ "$count" = "0" ]; then
+        {
+            echo "iptables -t filter --new XenServerDevstack"
+            echo "iptables -t filter -I INPUT -j XenServerDevstack"
+            echo "iptables -t filter -I XenServerDevstack -p tcp --dport 6640 -j ACCEPT"
+        } | $ssh_dom0
+        fi
     fi
 }