Abdulhadi, Honestly, I think that a design spec of getting DNS responses in 3ms across the board is unrealistic. My initial MX query for litc.ly took 367ms:
;; ADDITIONAL SECTION: exmail.litc.ly. 14400 IN A 197.215.159.227 dns2.lttnet.net. 21600 IN A 62.240.36.40 dns3.lttnet.net. 21600 IN A 62.240.36.40 ;; Query time: 367 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Sun Jul 9 12:50:58 2017 ;; MSG SIZE rcvd: 144 Additionally, given the operational environment in which you exist I would recommend that you strive for just providing good DNS services in general. Good luck. John From: bind-users [mailto:bind-users-boun...@lists.isc.org] On Behalf Of Abdulhadi Ettwejiri Sent: Sunday, July 09, 2017 2:32 AM To: bind-users@lists.isc.org Subject: designing the DNS from the scratch HI, we are ISP company , we are providing Internet to our customer, Recently one of our VIP customer ask for DNS service, and need the response time 3msec, we don't have enough knowledge of DNS, 1- To achieve the goal of my customer about the response time I need to know what's the optimal design solution for DNS ( Authoritative or Recursive(,or there is other design. 2- If the answer in the previous question an "authoritative", is there any registration & technical requirements for so (i.e. ccTLD, ... ) Best regards Abdulhadi Ettwejiri Technical Support Department [Description: LITC-Logo03] Zawia Street inside GPTC building | Tripoli | Libya | * + 218 91 9994265 * abdulhadi.ettwej...@litc.ly<mailto:abdulhadi.ettwej...@litc.ly> * + 218 21 3600234 * http://www.litc.ly<http://www.litc.ly/> 7 + 218 21 3617777
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