diff --git a/terraform/modules/docker-network/templates/scripts/firewall-setup.sh.tftpl b/terraform/modules/docker-network/templates/scripts/firewall-setup.sh.tftpl
index c595206..6ec2b32 100644
--- a/terraform/modules/docker-network/templates/scripts/firewall-setup.sh.tftpl
+++ b/terraform/modules/docker-network/templates/scripts/firewall-setup.sh.tftpl
@@ -8,4 +8,6 @@ ufw allow 80 comment HTTP
 ufw allow 443 comment HTTPS
 
 ufw allow to ${node_ip} port 2377 comment "Swarm join port"
+ufw allow to ${node_ip} port 7946 comment "overlay network node discovery"
+ufw allow to ${node_ip} port 4789 comment "overlay network traffic"
 ufw enable