tcpdchk

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; inappro-
       priate 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 under-
              stands.

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