Oracle® Database High Availability Overview
Granting and denying access to the a database is crucial for a secure network
environment. You can configure access control through a firewall or on the database.
For firewall support, you can configure Oracle Connection Manager to function as a
firewall, whereby it grants or denies clients access to a particular database service or a
computer based on a set of filtering rules. For the database, you can configure access
control parameters in the sqlnet.ora file to specify that clients using a particular
protocol are allowed or denied access....
