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overwrite particular public DNS records inside company network

Posts: 1
3084     0

I use two IB-1410 as DNS servers in our compay network.
For interal users I would now like to answer lookup requests for typical exteral, device-preconfigured NTP server like and with the IP address of our interal NTP server.

Does anybody have an idea how to do this?

Thank You in Advance,
Christian Brandstaetter

Re: overwrite particular public DNS records inside company network

Posts: 14
3084     0

Although this is an uncommon configuration you can configure for example as an authoritative zone and add an empty A record inside pointing for example to which will result in :


dig @<DNS IP> A

; <<>> DiG 9.8.3-P1 <<>> @x.x.x.x A
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11494
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;            IN    A

;; ANSWER SECTION:        28800    IN    A

;; Query time: 40 msec
;; SERVER: x.x.x.x#53(x.x.x.x)
;; WHEN: Tue Aug 30 19:50:06 2016
;; MSG SIZE  rcvd: 47


Re: overwrite particular public DNS records inside company network

Posts: 136
3084     0

Another option to re-write these requests and not need to be authoritative for the domain would be to leverage a Response Policy Zone (RPZ).


This does require a license for RPZ, but you can then create a local policy zone with an entry to redirect/rewrite any DNS responses you would like without needing to be authoriative for the zone.

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