TCP Wrapper is a computer application written by Dr. Wietse Venema. It is a security tool to control access to services run on an Operating System such as Linux.

The original code was written at the Eindhoven University of Technology, The Netherlands, in 1990, 1991, 1992, 1993, 1994 and 1995. As of June 1, 2001 the program has been disttributed under its own BSD-style license.

It is usually referred to as TCP Wrappers and is named tcp-wrappers in the Gentoo Linux portage package repository. In Gentoo Linux TCP Wrappers is enabled with the tcpd USE-flag.

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