08-30-2016 12:51 AM
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 ntp.apple.com and pool.ntp.org with the IP address of our interal NTP server.
Does anybody have an idea how to do this?
Thank You in Advance,
08-30-2016 11:03 AM
Although this is an uncommon configuration you can configure for example ntp.apple.com as an authoritative zone and add an empty A record inside pointing for example to 18.104.22.168 which will result in :
dig @<DNS IP> ntp.apple.com A
; <<>> DiG 9.8.3-P1 <<>> @x.x.x.x ntp.apple.com 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
;; QUESTION SECTION:
;ntp.apple.com. IN A
;; ANSWER SECTION:
ntp.apple.com. 28800 IN A 22.214.171.124
;; 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
09-02-2016 02:28 PM
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.