As [it](https://community.oracle.com/tech/apps-infra/discussion/4078954/not-able-to-connect-to-instance-using-serial-console) said, you still need to modity the connection string for outside key file ## Can OCI CLI help? https://docs.oracle.com/en-us/iaas/tools/oci-cli/2.9.1/oci_cli_docs/cmdref/compute/instance-console-connection.html