In this article we will explain what TCP wrappers are and how to configure them to restrict access to network services running on a Linux server. Before we start, however, we must clarify that the use of TCP wrappers does not eliminate the need for a properly configured firewall.
In this regard, you can think of this tool as a host-based access control list, and not as the ultimate security measure for your system. By using a firewall and TCP wrappers, instead of favoring one over the other, you will make sure that your server is not left with a single point of failure.
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