Maintenance Commands                                  TCPDCHK(1M)



NAME
     tcpdchk - tcp wrapper configuration checker

SYNOPSYS
     tcpdchk [-a] [-d] [-i inetconf] [-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  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  ALOW keyword. This applies only when the
          extended access control language is enabled (build with
          -DPROCESOPTIONS).

     -d   Examine hosts.allow and hosts.deny files in the current
          directory instead of the default ones.

     -i inetconf
          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.  Dae-
          mon 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:





SunOS 5.10                Last change:                          1






Maintenance Commands                                  TCPDCHK(1M)



     /etc/hosts.allow
     /etc/hosts.deny

SEE ALSO
     tcpdmatch(1M), explain what tcpd would do in specific cases.
     hostsaccess(4), format of the tcpd access control tables.
     hostsoptions(4), format of the language extensions.
     inetd.conf(4), format of the inetd control file.
     inetd(1M), how to invoke tcpd from inetd using the libwrap library.
     inetadm(1M), managing inetd services in the Service Management Framework.


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


ATRIBUTES
     See attributes(5) for descriptions of the following attri-
     butes:

     
       ATRIBUTE TYPE     ATRIBUTE VALUE
    
     Availability         SUNWtcpd       
    
     Interface Stability  Committed      
    

NOTES
     Source for tcpwrappers is available in the SUNWtcpdS pack-
     age.




















SunOS 5.10                Last change:                          2