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NAME    [Toc]    [Back]

     tcpdchk - tcp wrapper configuration checker

SYNOPSIS    [Toc]    [Back]

     tcpdchk [-a] [-d] [-i inet_conf] [-v]

DESCRIPTION    [Toc]    [Back]

     tcpdchk examines your tcp wrapper configuration and  reports
all potential
     and  real  problems  it  can find.  The program examines the
tcpd(8) 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(8) network configuration file.

     tcpdchk  reports  problems  such  as non-existent pathnames;
services that
     appear in tcpd(8) access control rules,  but  are  not  controlled by
     tcpd(8);  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.

     The options are as follows:

     -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
             inetd.conf network configuration file, or  when  you
wish to test
             with a non-default one.

     -v       Display  the  contents of each access control rule.
Daemon lists,
             client lists, shell commands and options  are  shown
in a prettyprinted
 format; this makes it easier for you to spot
any discrepancies
 between what you want and  what  the  program

FILES    [Toc]    [Back]

     /etc/hosts.allow  access control table (allow list)
     /etc/hosts.deny   access control table (deny list)

SEE ALSO    [Toc]    [Back]

     hosts_access(5),       hosts_options(5),      inetd.conf(5),

AUTHORS    [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

OpenBSD     3.6                           June      23,      1997
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