DNS Parlor Tricks for Network Discovery
DNS is an amazing protocol. After starting life as a simple mechanism for name resolution, it is now used to enforce TLS rules, prevent email impersonation, authorize users, protect endpoints, enable service discovery, and much more. DNS services run across a range of devices and provide quite a bit of information about the environment, given the right queries. This post describes the techniques used by the Beta 2 version of Rumble Network Discovery to identify DNS services.
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