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TCPDCHK(8)                                                                                        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 net-work network
       work 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 con-figuration configuration
              figuration 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.
       tlid.conf(5), format of the tlid 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)