The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.
The TCP wrappers feature mediates requests from clients to
services, and control access based on rules that you define in
the /etc/hosts.deny and
/etc/hosts.allow files. You can restrict and
permit service access for specific hosts or whole networks. A
common way of using TCP wrappers is to detect intrusion
attempts. For example, if a known malicious host or network
attempts to access a service, you can deny access and send a
warning message about the event to a log file or to the system
console.
For more information, see Section 25.4, “About TCP Wrappers”.