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 tcpd.conf(4)                                                   tcpd.conf(4)

 NAME    [Toc]    [Back]
      tcpd.conf - configuration file for tcpd

 DESCRIPTION    [Toc]    [Back]
      When inetd invokes tcpd for a service, it will read /etc/tcpd.conf and
      perform access control checks (see tcpd(1M)).

      Each line in the file is treated either as a comment or as
      configuration information.  Commented lines begin with #.  Uncommented
      lines contain two required fields, key and value.  The fields are
      separated by tabs and/or spaces.  A line can be continued if it
      terminates with a backslash (\).

      The following are the configuration parameters:

      rfc931_timeout n

           The RFC931 username lookup can be enabled or disabled through
           this parameter.  Value for n specifies the time-out value (in
           seconds), to be used while getting the username information from
           the client.

           A value of zero for n disables the rfc931 feature.

           The default configuration of this disables the rfc931 feature
           with n value equal to 0.

           The maximum value to which n can be set is 30 seconds.

      on_reverselookup_fail {allow | deny}

           This parameter determines whether tcpd should allow or deny the
           connection request on reverse lookup failure.

           In both the cases, tcpd will log the event of reverse lookup
           failure, but in the deny case, it will reject the connection
           request just after reverse lookup failure.  In the allow case,
           the hostname can be matched with the PARANOID wildcard (see
           hosts_options(5)) in access control files (/etc/hosts.allow and

           The default value for this is deny.

      log_level {normal | extended}

           This parameter determines the level at which tcpd should log the
           information using syslog.  A value of extended will cause the TCP
           Wrappers daemon (see tcpd(1M)), to log the ACLs information such
           as with which entry the client request is matched and this
           entry's related options.

 Hewlett-Packard Company            - 1 -   HP-UX 11i Version 2: August 2003

 tcpd.conf(4)                                                   tcpd.conf(4)

           The default value for this entry is normal, in which case tcpd
           will only log the connection details about refusal or acceptance
           of the connection in the form of `connection from abc@xyz_host'.

    Processing Invalid and Multiple Entries    [Toc]    [Back]
      tcpd processes invalid and multiple entries in the following ways:

      +  An invalid entry for a configuration parameter is ignored.
         Instead, the default value for the configuration parameter will be
         used.  For example, the following invalid entry for log_level will
         be replaced by the use of normal.

         log_level   abcd

         will be treated as:

         log_level   normal

      +  If multiple entries for a configuration parameter are specified,
         only the last occurring entry is processed and the rest are
         ignored.  For example, in the following two entries for
         rfc931_timeout, the last value of 25 is used for that parameter.

                rfc931_timeout   10
                rfc931_timeout   25

 EXAMPLES    [Toc]    [Back]
      To set the a 25 seconds time-out value for RFC931 user name lookup:

           rfc931_timeout   25

      To disable the RFC931 user name lookup:

           rfc931_timeout   0

      To make tcpd to allow a host on reverse lookup failure and process
      that host as PARANOID, in ACLs:

           on_reverselookup_fail     allow

      To set the extended logging option:

           log_level     extended

 AUTHOR    [Toc]    [Back]
      tcpd.conf was developed by the Hewlett-Packard.

 SEE ALSO    [Toc]    [Back]
      inetd(1M), tcpd(1M).

 Hewlett-Packard Company            - 2 -   HP-UX 11i Version 2: August 2003
[ Back ]
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