How to Open Port on Oracle Cloud Ubuntu Server
Oracle Cloud Ubuntu virtual machines are not compatible with UFW firewall. This is because oracle cloud needs some iptables rules
Oracle Cloud
https://www.oracle.com/cloud/free/ – Every free account have 2 servers free for life. Only for development purpose. Allow ICMP (ping) in Oracle
Allow ICMP (ping) in Oracle Cloud
Oracle cloud do not allow ICMP/ping to compute instances. To enable ping, you need to enable ICMP in the security