tcpdchk.1 (2010 09)

t
tcpdchk(1) tcpdchk(1)
NAME
tcpdchk - check tcp wrapper configuration
SYNOPSYS
/usr/bin/tcpdchk
[-a][-d][-i inet_conf ][
-v]
DESCRIPTION
tcpdchk examines the tcp wrapper configuration and reports all potential and real problems it can
encounter. The command 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 configuration file.
tcpdchk reports the following types of problems:
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.
Wherever possible,
tcpdchk provides a helpful suggestion to fix the problem.
Options
The following options are supported by
tcpdchk. If no options are specified, then it uses the default
location of the files.
-a Report access control rules that permit access without an explicit ALLOW keyword.
-d Examine the hosts.allow and hosts.deny files in the current directory instead of the default
ones.
-i inet_conf
Specify this option when tcpdchk is unable to find your inetd.conf configuration file, or when
you suspect that tcpdchk is using the wrong file. inet_conf is the path name of the
inetd.conf
configuration file whose entries you want to examine.
-v Display the contents of each access control rule. Daemon lists, client lists, shell commands and
options are shown in a printable format. The display helps you find any discrepancies between
what you want and what tcpdchk understands for the access control rules.
AUTHOR
Wietse Venema ([e-mail]),
Department of Mathematics and Computing Science,
Eindhoven University of Technology
Den Dolech 2, P.O. Box 513,
5600 MB Eindhoven, The Netherlands
FILES
The default locations of the
tcpd access control tables are:
/etc/hosts.allow (daemon, client) pairs that are granted access.
/etc/hosts.deny (daemon, client) pairs that are denied access.
SEE ALSO
tcpdmatch (1), explains what
tcpd would do in specific cases.
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1