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
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
\" @(#) tcpdchk.8 1.3 95/01/08 17:00:30
