tcp wrapper configuration checker
see also :
[-d] [-i inet_conf] [-v]
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examines your tcp wrapper configuration and reports all
potential and real problems it can find. The program
examines the tcpd access control files (by default,
these are /etc/hosts.allow and
/etc/hosts.deny), and compares the entries in these
files against entries in the inetd network
reports problems such as non-existent pathnames; services
that appear in tcpd access control rules, but are not
controlled by tcpd; services that should not be
wrapped; non-existent host names or non-internet address
forms; occurrences of host aliases instead of official host
names; hosts with a name/address conflict; inappropriate use
of wildcard patterns; inappropriate use of NIS netgroups or
references to non-existent NIS netgroups; references to
non-existent options; invalid arguments to options; and so
tcpdchk provides a helpful suggestion to fix the
Report access control rules that
permit access without an explicit ALLOW keyword.
Examine hosts.allow and hosts.deny files
in the current directory instead of the default ones.
Specify this option when
tcpdchk is unable to find your inetd.conf
network configuration file, or when you suspect that the
program uses the wrong one.
Display the contents of each access control rule. Daemon
lists, client lists, shell commands and options are shown in
a pretty-printed format; this makes it easier for you to
spot any discrepancies between what you want and what the
The default locations of the tcpd access control tables
explain what tcpd would do in specific cases.
hosts_access, format of the tcpd access control tables.
hosts_options, format of the language extensions.
inetd.conf, format of the inetd control file.
Department of Mathematics and Computing Science,
Eindhoven University of Technology
Den Dolech 2, P.O. Box 513,
5600 MB Eindhoven, The Netherlands