diff --git a/prometheus-node-exporter/install.sh b/prometheus-node-exporter/install.sh
index 77a102d..7aa29ac 100644
--- a/prometheus-node-exporter/install.sh
+++ b/prometheus-node-exporter/install.sh
@@ -74,3 +74,8 @@ EOF
 systemctl daemon-reload
 systemctl enable node_exporter
 systemctl restart node_exporter
+
+## Open port from firewall
+
+ufw allow 9100/tcp
+ufw enable