CentOS 7 - Updates for x86_64: system environment/daemons: tcp_wrappers
tcp_wrappers - A security tool which acts as a wrapper for TCP daemons
The tcp_wrappers package provides small daemon programs which can
monitor and filter incoming requests for systat, finger, FTP, telnet,
rlogin, rsh, exec, tftp, talk and other network services.
Install the tcp_wrappers program if you need a security tool for
filtering incoming network services requests.
This version also supports IPv6.