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DNSCHECK(8)					      DNSCHECK(8)

NAME
       dnscheck - checks forward and reverse DNS entries

SYNOPSIS
       dnscheck [ -c ] [ -h ] [ -t ] [ -v ] [ -x ] [ host ...  ]

DESCRIPTION
       The  dnscheck  utility  checks the forward and reverse DNS
       entries for the given host(s) or for the value returned by
       gethostname(2)  if the host name or IP address is omitted.
       The host argument may be either a normal domain name  such
       as  myhost.foobah.org  or  an  IP  address  in dotted-quad
       [123.234.123.234] form and there may be more than one such
       argument given.

       The  intent of this utility is to run it without any argu-
       ments and have it tell you if  your  system's  concept  of
       what it's name is matches, or is consistent with, what the
       DNS thinks is the name of your system.  This is useful  in
       tracking	 down obscure problems when configuring the Merit
       AAA server's clients(5) file.

       The forward and reverse information is  sent  to	 standard
       output  followed	 by  any information for multiple address
       and or multiple DNS names, one  per  line.   If	the  host
       given  is a CNAME then both it and the fully qualified DNS
       name are printed along with its IP address.  If	the  host
       given  is  a  fully  qualified  DNS name which has aliases
       (CNAMEs), then dnscheck is not able to retrieve these from
       the DNS.

OPTIONS
       -c     Toggles  checking	 mode.	 This  option defaults to
	      "on".  If this option is toggled to "off" then  the
	      dnscheck	utility	 will perform only one of the two
	      checks, either forward or reverse,  for  the  given
	      host.

       -h     Prints a usage message.

       -t     Turns  on	 terse	mode.	This  option  defaults to
	      "off".

       -v     Shows the RCS version information.

       -x     This option  is  used  to	 increase  the	debugging
	      level.   The  debugging  level  is  initially zero.
	      Each  -x	option	adds  to  the  default,	  thereby
	      enabling	more and more debugging information to be
	      produced.

SEE ALSO
       gethostname(2), clients(5)

			   4 March 1997				1

DNSCHECK(8)					      DNSCHECK(8)

BUGS

			   4 March 1997				2

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