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 tcpdchk(1)                                                       tcpdchk(1)




 NAME    [Toc]    [Back]
      tcpdchk - check tcp wrapper configuration

 SYNOPSYS    [Toc]    [Back]
      /usr/bin/tcpdchk [-a] [-d] [-i inet_conf] [-v]

 DESCRIPTION    [Toc]    [Back]
      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    [Toc]    [Back]
      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.





 Hewlett-Packard Company            - 1 -   HP-UX 11i Version 2: August 2003






 tcpdchk(1)                                                       tcpdchk(1)




      -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    [Toc]    [Back]
           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

 FILES    [Toc]    [Back]
      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    [Toc]    [Back]
      tcpdmatch(1), explains what tcpd would do in specific cases.

      inetd.conf(4), format of the inetd control file.

      hosts_access(5), format of the tcpd access control tables.

      hosts_options(5), format of the language extensions.


 Hewlett-Packard Company            - 2 -   HP-UX 11i Version 2: August 2003
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