Dear Monks, first of all I have to admit something: Networks and the like are almost a tabu for myself. However, I am in need to now the DNS name (I guess this is how it is called) of the network in which my computer is. If my computer is connected to the network of the Princeton University, for example, I want to get: princeton.edu.

After some experimenting, I came out with the following script which seems to work. However it looks like I am moving in a circle, going forth and back between IP, DNS, etc. This means I am very unhappy with the result. What would be a better way to achieve my goal?

#!/usr/bin/env perl

use strict;
use warnings;
use Sys::Hostname;
use Socket;

my($host)=gethostbyname(hostname);

my($addr)=inet_ntoa((gethostbyname(hostname))[4]);

my $name = gethostbyaddr(inet_aton($addr), AF_INET)
or die "Can't resolve $addr: $!\n";

$name=~s/($host\.)//g;
print "DSN of network in which I am now: $name\n";

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In reply to Resolving DNS of local network by IB2017

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