diff --git a/data/data/openstack/topology/sg-master.tf b/data/data/openstack/topology/sg-master.tf
index 933eb093016..7159db7bfed 100644
--- a/data/data/openstack/topology/sg-master.tf
+++ b/data/data/openstack/topology/sg-master.tf
@@ -33,6 +33,16 @@ resource "openstack_networking_secgroup_rule_v2" "master_ingress_ssh" {
   security_group_id = openstack_networking_secgroup_v2.master.id
 }
 
+resource "openstack_networking_secgroup_rule_v2" "master_ingress_mdns_udp" {
+  direction         = "ingress"
+  ethertype         = "IPv4"
+  protocol          = "udp"
+  port_range_min    = 5353
+  port_range_max    = 5353
+  remote_ip_prefix  = "${var.cidr_block}"
+  security_group_id = "${openstack_networking_secgroup_v2.master.id}"
+}
+
 resource "openstack_networking_secgroup_rule_v2" "master_ingress_http" {
   direction         = "ingress"
   ethertype         = "IPv4"