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I know the authoritative DNS servers for records of a domain. What I haven`t determined is where queries internal to our network are consulted for records. I do know there are other servers used, serving different values internally, and would like to determine their IP addresses or servernames. Even just the first one consulted would be a good start.

Assuming I flush my local DNS cache resolver first (ipconfig /flushdns and possibly nbtstat -R), is there a way to determine which hop in a tracert is the DNS (DHCP?) server that serves dns records within the network zone?

As a side note: I'm not sure if this is the same thing as a "serving a zone file", but gather the latter is related to more than just DNS. Comments welcome to clarify this.

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Bind's dig tool will give you an answer:

$ dig
...
;; Query time: 9 msec
;; SERVER: fdcc:216f:1d2c::110#53(fdcc:216f:1d2c::110)
;; WHEN: Wed Jan 22 06:49:54 UTC 2014
;; MSG SIZE  rcvd: 239

The SERVER line has the address of the server that actually replied.

  • First stop is the firewall. Any chance dig can show one hop past that? – Dallas Jan 22 '14 at 13:54
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Turns out that there was a "DNS conditional forwarder" in place that would send anyone internally to a specific DNS server.

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