xenial (1) fdnsnamep.1.gz

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)