tcpdchk(8)

NAME
     tcpdchk - tcp wrapper configuration checker

SYNOPSYS
     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.
     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