Hi,
Once i delegated NS record in my ISP name server to my company name server
for mail.myoffice.com website as below. Do i need to allow DNS port from
ANY(INTERNET) to my DNS server in firewall or i just need to allow DNS traffic
only from ISP DNS server
ISP DNS server configuration
mycompany-dns-server-ip IN A 10.10.10.10
mail.myoffice.com IN NS <mycompany dns server ip>
Regards
Papdheen M
From: Kevin Darcy <k...@chrysler.com>
To: bind-users@lists.isc.org
Sent: Sunday, 18 September 2011 5:09 PM
Subject: Re: Query regarding NS record
Are you talking about recursive clients failing over?
Or other nameservers trying to talk to yours, non-recursively?
Recursive clients don't use NS records at all and you need to
approach the failover problem in a completely different way (e.g.
relying on the client failing over from one resolver IP address to
another, or implementing an Anycast solution).
If you're talking about nameserver-to-nameserver traffic, then just
publish multiple NS records for the relevant zone(s) and the
nameserver-selection algorithm embedded in every known
iterative-resolver implementation will take care of the
load-balancing and failover; to summarize, faster-responding
nameservers will be chosen over slower-responding ones.
- Kevin
On 9/16/2011 11:17 AM, babu dheen wrote:
Hi,
> Can anyone let me know how i can resolve the below requirement.
>
>
>Requirement:
>
>We have two offices. One is main office and another one is remote branch
>office. Now my company client requirement is that if main office DNS server is
>not reachable, all DNS query should be sent to branch office DNS server. How
>this can be acheived using BIND?
>
>For example, my company mail website is; mail.mycompany.com which is pointed
>as below in ISP name server.
>
>mail.mycompany.com IN NS ns1.mainoffice.com
>mail.mycompany.com IN NS ns1.branceoffice.com
>
> Is the above record is correct or not?
>
> Please suggest.
>
>Regards
>papdheen M
>
>
>
>
>
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