What are two ways to enable a port on your DBaaS VM server for access to your DBaaS
instance?
A.
Use your public and private key pairs to define a list of preferred ports that get enabled
during your DBaaS instance installation.
B.
Create a tunnel for port forwardingby using SSH.
C.
Configure all remote connections through port 22 that is assigned by default for SSH
connections.
D.
Ask Oracle DBaaS Support to open the required ports.
E.
Use the DBaaS Compute Cloud Service Console to open ports to a set of IP addresses.
Explanation:
C: SSH is a cryptographic network protocol that uses two keys, one public and one private,
to provide secure communication between two networked computers. Port 22 is the
standard TCP/IP port that is assigned to SSH servers.
B: To access network protocols and services on a compute node by using a port other than
port 22, you must either:
Using Oracle Database Cloud Service (February 2017), 3-2
https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/using-oracle-databasecloud-service.pdf
B,C
B,C
B, E
Two ways to enable a port to a database deployment:
>>> The first requires access to the Compute Cloud Service console to open ports to a set of IP addresses.
The access is persistent. (an ssh tunnel is not persistent)
The port remains open to communication all the time.
>>> The second is to create a tunnel for port forwarding using ssh.
The configured ssh process must be running on the consumer side of the tunnel.
So an SSH tunnel is NOT persistent because it requires the configured ssh process to always be running on the client side.
B, E