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NAME

       fdnsnamep - resolve an IPv4 or IPv6 address to a hostname with paranoid
       checking

SYNOPSIS

       fdnsname <IP address>

DESCRIPTION

       fdnsname will attempt to look up  a  single  hostname  for  IP  address
       (which  is  an IPv4 address in dotted-quad format or an IPv6 address in
       colon-seperated format).  If one is found, the program checks  to  make
       sure  that  the  hostname has a corresponding A or AAAA record pointing
       back to the supplied IP.  If so, the hostname is  printed  to  standard
       output and the program exits with return code 0.  If the paranoid check
       fails, nothing is printed and the program exits with return code 3.  If
       no  hostname  is  found,  nothing is printed and the program exits with
       return code 1.

AUTHOR

       Ian Gulliver <ian@penguinhosting.net>

SEE ALSO

       libfiredns(3)

                                  2004-02-13                      fdnsnamep(1)