The default firewall configuration of Oracle Linux in the OCI environment basically denies everything. To enable traffic of any kind these following commands are needed.
sudo systemctl status firewalld
sudo firewall-cmd --list-all
sudo firewall-cmd --zone=public
sudo firewall-cmd --zone=public --add-port=5201/tcp --permanent
sudo firewall-cmd --zone=public --add-port=5201/udp --permanent