Am 09.07.2017 um 09:31 schrieb Abdulhadi Ettwejiri:
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.
that question is wrong from the begin and it depends *what* type of dns
service
if you provide just resolvers for your customer using on his computers
as resolver it's a recursive (and no recursive server these days should
answer to the whole internet because of amplification attacks)
if you want to host the nameserver for your customers domains it's
authoritative
2-If the answer in the previous question an “authoritative”, is there
any registration & technical requirements for so (i.e. ccTLD, … )
a domain points to nameservers, on the machine hosting the nameservers
you have open port 53 TUDP *and* TCP and the zone needs to be setup
here you go:
https://www.iana.org/help/nameserver-requirements
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