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Linux TCP Wrappers & Which Services can be secured via TCP Wrappers

TCP Wrapper is a host-based networking ACL(Access Control List) system, It is used to filter network access to Internet Protocol servers on UNIX like operating systems such as CentOS,Ubuntu,RHEL,Fedora & Solaris. It allows host or subnetwork IP addresses & names query replies, to be used as tokens on which to filter for access control purposes.