Public OCI server ports.

• Go to Oracle console Virtual Cloud Networks setting and select the VCN bound to the instance.

• Choose the default Security Lists and config ingress rules. (Usually open 80 port to http connect, etc.)

• Use terminal or any SSH connect tool to access OCI server. And public the expected port:

# public {port}
 firewall-cmd --zone=public --add-port={port}/tcp --permanent
# reload firewald service
 firewall-cmd --reload