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rodolico |
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#! /usr/bin/env perl
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use strict;
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use warnings;
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use Net::DNS;
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my $RR_DIR = '/etc/bind/SEC';
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my @nameServers = qw/9.9.9.9 1.1.1.1 8.8.8.8 8.8.4.4 149.112.112.112 208.67.222.222 208.67.220.220 1.0.0.1 64.6.64.6 64.6.65.6/;
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sub getNSRecords {
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my $domain = shift;
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use Net::DNS;
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# run the following with a name server randomly chosen from @nameServers
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my $res = Net::DNS::Resolver->new (nameserver => ($nameServers[rand @nameServers]) );
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my $reply = $res->query($domain, "NS");
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my @result = ();
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if ($reply) {
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foreach my $rr (grep { $_->type eq "NS" } $reply->answer) {
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#print $rr->nsdname, "\n";
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push @result,$rr->nsdname;
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}
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} else {
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warn "query failed for [$domain]: ", $res->errorstring, "\n";
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}
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return \@result;
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}
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my @domains = `ls $RR_DIR`;
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chomp @domains;
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#print join( "\n", @{ &getNSRecords( "dailydata.net" ) }) . "\n";
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#die;
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my %results;
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my $count = 0;
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foreach my $domain (sort @domains) {
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print STDERR '.';
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next if $domain =~ m/\.arpa$/;
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my $ns = &getNSRecords( $domain );
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if ( $ns && scalar (@$ns) ) {
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foreach my $thisNS ( @$ns ) {
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push @{ $results{$thisNS} }, $domain;
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}
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} else {
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push @{ $results{'Unknown'} }, $domain;
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}
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sleep(1);
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# last if $count++ > 10;
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}
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foreach my $ns ( sort keys %results ) {
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print "$ns\n";
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print "\t", join( "\n\t", @{ $results{$ns} } ) . "\n";
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}
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1;
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