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 24.4, “About TCP Wrappers”.