Background – IPv6
A good systems/security/network administrator has a slew of tools up their sleeves to support their specialty. Unfortunately, many tools still do not support IPv6; those that do put a hurting on your wallet. The below was used to test connectivity across a router using iptables, to make sure the IPv6 addresses were successfully blocked.
The IPv6 Generator
<?php
$startime = microtime(true);
$prefix = "fe80:1234:";
$octets = 6;
$fin = pow($octets, 65536);
echo "Resolving $fin IPv6 Addressesnn";
for($i = 0; $i<= $fin;$i++){
$oct = dechex($i);
$addytmp = str_pad($oct, ($octets*3), "0", STR_PAD_LEFT);
$addytmp = str_split($addytmp, 4);
$addy = implode(":", $addytmp);
echo $prefix.$addy."n";
}
echo "It took ".(microtime(true)-$startime)." seconds";Other Uses
You can even do something like the following to test IPv6 ranges for port scanning:
<?php
$prefix = "fe80:1234:";
$octets = 6;
$fin = pow($octets, 65536);
for($i = 0; $i<= $fin;$i++){
$oct = dechex($i);
$addytmp = str_pad($oct, ($octets*3), "0", STR_PAD_LEFT);
$addytmp = str_split($addytmp, 4);
$addy = implode(":", $addytmp);
$fs = fsockopen($addy, 22);
if($fs){
echo $addy." has port 22 openn";
}
fclose($fs);
}How long does it take you to run the above?
Update: I will be updating this script shortly to support automatic detection of provided octets and adding a multiplier to speed it up.
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