NAME
tcpdchk - tcp wrapper configuration checker
SYNOPSIS
tcpdchk [-a] [-d] [-i inet_conf] [-v]
DESCRIPTION
tcpdchk 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 configuration file.
tcpdchk 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 on.
Where possible, tcpdchk provides a helpful suggestion to fix the
problem.
OPTIONS
-a Report access control rules that permit access without an
explicit ALLOW keyword.
-d Examine 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 network configuration file, or when you suspect that
the program uses the wrong one.
-v 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 program
understands.
FILES
The default locations of the tcpd access control tables are:
/etc/hosts.allow
/etc/hosts.deny
SEE ALSO
tcpdmatch(8), explain what tcpd would do in specific cases.
hosts_access(5), format of the tcpd access control tables.
hosts_options(5), format of the language extensions.
inetd.conf(5), format of the inetd control file.
AUTHORS
Wietse Venema (wietse@wzv.win.tue.nl),
Department of Mathematics and Computing Science,
Eindhoven University of Technology
Den Dolech 2, P.O. Box 513,
5600 MB Eindhoven, The Netherlands