diff --git a/lib/neutron b/lib/neutron
index 5370392..9e9eb2d 100644
--- a/lib/neutron
+++ b/lib/neutron
@@ -182,6 +182,8 @@
             iniset $NEUTRON_CORE_PLUGIN_CONF securitygroup iptables_hybrid
             iniset $NEUTRON_CORE_PLUGIN_CONF ovs local_ip $HOST_IP
         fi
+
+        enable_kernel_bridge_firewall
     fi
 
     # DHCP Agent
diff --git a/lib/neutron_plugins/linuxbridge_agent b/lib/neutron_plugins/linuxbridge_agent
index 7d59e13..d0de2f5 100644
--- a/lib/neutron_plugins/linuxbridge_agent
+++ b/lib/neutron_plugins/linuxbridge_agent
@@ -69,6 +69,7 @@
     fi
     if [[ "$Q_USE_SECGROUP" == "True" ]]; then
         iniset /$Q_PLUGIN_CONF_FILE securitygroup firewall_driver neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
+        enable_kernel_bridge_firewall
     else
         iniset /$Q_PLUGIN_CONF_FILE securitygroup firewall_driver neutron.agent.firewall.NoopFirewallDriver
     fi
diff --git a/lib/neutron_plugins/ovs_base b/lib/neutron_plugins/ovs_base
index f6d10ea..3cd6c85 100644
--- a/lib/neutron_plugins/ovs_base
+++ b/lib/neutron_plugins/ovs_base
@@ -84,6 +84,7 @@
 function _neutron_ovs_base_configure_firewall_driver {
     if [[ "$Q_USE_SECGROUP" == "True" ]]; then
         iniset /$Q_PLUGIN_CONF_FILE securitygroup firewall_driver neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
+        enable_kernel_bridge_firewall
     else
         iniset /$Q_PLUGIN_CONF_FILE securitygroup firewall_driver neutron.agent.firewall.NoopFirewallDriver
     fi
diff --git a/lib/nova b/lib/nova
index 334cba6..d321b73 100644
--- a/lib/nova
+++ b/lib/nova
@@ -866,9 +866,13 @@
     run_process n-cond "$NOVA_BIN_DIR/nova-conductor --config-file $compute_cell_conf"
     run_process n-cell-region "$NOVA_BIN_DIR/nova-cells --config-file $api_cell_conf"
     run_process n-cell-child "$NOVA_BIN_DIR/nova-cells --config-file $compute_cell_conf"
-
     run_process n-crt "$NOVA_BIN_DIR/nova-cert --config-file $api_cell_conf"
+
+    if is_service_enabled n-net; then
+        enable_kernel_bridge_firewall
+    fi
     run_process n-net "$NOVA_BIN_DIR/nova-network --config-file $compute_cell_conf"
+
     run_process n-sch "$NOVA_BIN_DIR/nova-scheduler --config-file $compute_cell_conf"
     run_process n-api-meta "$NOVA_BIN_DIR/nova-api-metadata --config-file $compute_cell_conf"