Additional information concerning TCP wrappers and
xinetd is available from system documentation and on
the Web.
15.5.1. Installed Documentation
The bundled documentation on your system is a good place to start
looking for additional TCP Wrappers, xinetd, and
access control configuration options.
/usr/share/doc/tcp_wrappers-<version>/
— Contains a README file that discusses
how TCP wrappers work and the various hostname and host address
spoofing risks that exist.
/usr/share/doc/xinetd-<version>/
— Includes a README file that discusses
aspects of access control and a sample.conf
file with various ideas for modifying service-specific
configuration files in the /etc/xinetd.d/
directory.
man 5 hosts_access — The man page for
the TCP wrappers hosts access control files.
man hosts_options — The man page for
the TCP wrappers options fields.
man xinetd.conf — The man page listing
xinetd configuration options.
man xinetd — The man page for
the xinetd super service daemon.
15.5.2. Useful Websites
http://www.xinetd.org
— The home of xinetd, containing sample
configuration files, a full listing of features, and an
informative FAQ.
Red Hat Linux Security Guide ;
Red Hat, Inc. — Provides an overview of workstation, server,
and network security with specific suggestions regarding TCP
wrappers and xinetd.
Hacking Linux Exposed by Brian Hatch,
James Lee, and George Kurtz; Osbourne/McGraw-Hill — An
excellent security resource with featuring information about TCP
wrappers and xinetd.
