DNS forwarder configuration

Posted on 2011-04-26
Last Modified: 2012-05-11
Please help me to configure forwarders in my DNS servers.
Criteria given below..

i have three domains called  "", "" & "".
I need to resolve domain & machines from for this purpose i have configurd forwarder for and now i need to configure forwarder for domain.
Please help me in this case..
Question by:aarun_tcs
    LVL 74

    Expert Comment

    by:Glen Knight
    You want to resolve them internally? Are they internal or external domains?

    Author Comment

    external domains
    LVL 74

    Expert Comment

    by:Glen Knight
    So why are you adding forwarders? I am assuming you are talking about conditional forwarders?

    All you need to do is add your ISP DNS servers to the forwarders tab on the properties of the server in the DNS console.  Make sure there is no zone for these domains and DNS will do the rest.
    LVL 7

    Accepted Solution

    Though these are external domains, I am assuming that there is a site-to-site connectivity so the internal networks of any domain can be reached reached from the other two domains.
    You can configure conditional forwarders as below: ----> conditional forwarder ----> Internet sites - ISP DNS IP
                                                              - DNS IP
                                                       - DNS IP
    (You can skip the last one considering that there is delegation configured for am, on DNS server and there is connectivity throughout.) ----> conditional forwarder ----> Internet sites - ISP DNS IP
                                                                - DNS IP
    ( will not require forwarding as this is a child domain, and considering delegation is already configured.) ----> conditional forwarder ----> All other domains - DNS IP

    Another solution is that you can also configure Zones Transfer between the DNS server of the three domains.
    For this you will have to create enable zone transfer and then specify the IP of specific DNS servers to which these zones be transfered, then create secondary zones by same name on the other two DNS and then let the zone transfer happen.

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