Red Hat Enterprise Linux Reference Guide, Red Hat, Inc. — This
companion manual contains detailed information about how TCP
wrappers and xinetd allow or deny access as well
as how to configure network access using them. It also provides
instructions for creating iptables firewall
rules.
Red Hat Enterprise Linux Security Guide Red Hat, Inc. — This
manual discusses securing services with TCP wrappers and
xinetd such as logging denied connection
attempts.