Provided by: tcpd_7.6.q-32_amd64 bug


       tcpdchk - tcp wrapper configuration checker


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


       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.


       -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  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


       The default locations of the tcpd access control tables are:



       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.


       Wietse Venema (,
       Department of Mathematics and Computing Science,
       Eindhoven University of Technology
       Den Dolech 2, P.O. Box 513,
       5600 MB Eindhoven, The Netherlands