diff --git a/bootstrap-yum.sh b/bootstrap-yum.sh
index d493572..a7bac2f 100644
--- a/bootstrap-yum.sh
+++ b/bootstrap-yum.sh
@@ -289,8 +289,14 @@ echo ""
 echo "Congratulations"
 echo "---------------"
 echo ""
-echo "OpenNMS is starting up and might take a few seconds. You can access the"
-echo "web application with"
+echo "OpenNMS is starting up and might take a few seconds." 
+echo "By default CentOS 7 comes with a firewall enabled. You need to allow"
+echo "port 8980/TCP to connect to the web application with"
+echo ""
+echo "  firewall-cmd --permanent --add-port=8980/tcp"
+echo "  systemctl restart firewalld"
+echo ""
+echo "You should now be able to access the web application with"
 echo ""
 echo "  http://this-systems-ip:8980"
 echo ""