DNS Redundancy - Backup to my authoritative DNS server

Posted on 2009-04-20
Last Modified: 2012-05-06
DNS Redundancy

In NOC A I have a web server and an authoritative DNS server.  
In NOC B I have a backup web server.

The authoritative DNS server has 2 WAN links on it.  If one WAN goes down, it serves out the IP address of the secondary WAN connection.

How can I configure my DNS so that if a) the DNS servers dies or b) or both WAN links go down, our domain is resolved to NOC B and the backup web server?

Question by:wskorski
    LVL 6

    Expert Comment

    Is this a Windows environment? (Windows DNS?)
    LVL 6

    Expert Comment

    And is this for name resolution inside a network or for an internet domain?

    Author Comment

    Yes, it is a Windows environment.  
    It is for internet domain.
    The DNS device is a dual WAN Peplink router with authoritative DNS built-in.
    LVL 6

    Assisted Solution

    The easiest thing would be to add another DNS server (service) at NOC B and create a secondary NS record for your domain pointing to it.

    Accepted Solution

    How about using a service like

    If I understand you correctly, at the registrar I would would have the first entry point to NOC A dns server, the 2nd entry point to (or NOC B DNS server)?

    LVL 6

    Expert Comment

    Yes - correct. That would take any reliance off of NOC B.

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