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)