# getip.pl
# (c) 2005 Christoph Bussenius
# This Perl script is in the public domain
use strict;
use warnings;

my $route = `ping -nRc1 maila.microsoft.com` or die "hey, pinging problems";
$route =~ s/.*?RR://s;
while ($route =~ m{(\d+\.\d+\.\d+\.\d+)}g) {
  my $ip=$1;
  next if $ip =~ /^10\./;
  next if $ip =~ /^192\.168\./;
  next if $ip =~ /^172\.(\d+)\./ and $1 < 32 and $1 >= 16;
  next if $ip =~ /^127\./;
  print "My IP is $ip\n";
  last;
}