TCPDCHK(8)						      System Manager's Manual							TCPDCHK(8)

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 or tlid network configuration files.

       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. This applies only when the extended access control
	      language is enabled (build with -DPROCESS_OPTIONS).

       -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 or tlid.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)