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    Command:

    tcpdchk

    
    
    

    SYNOPSIS

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

    DESCRIPTION

           tcpdchk  examines your tcp wrapper configuration and reports all poten-
           tial 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  prob-
           lem.
    
    
    

    OPTIONS

           -a     Report  access  control  rules  that  permit  access  without an
                  explicit ALLOW keyword.
    
           -d     Examine hosts.allow and hosts.deny files in the  current  direc-
                  tory 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 dis-
                  crepancies 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.
    
    
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