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Stephen_Winter's avatar
Stephen_Winter
Icon for Nimbostratus rankNimbostratus
Dec 14, 2007

GTM and Microsoft DNS.

Hi, I am testing one of my GTM's on our internal network where our Primary DNS server is a Microsoft AD server. When a client asks the microsoft DNS server for a GTM balanced name, we want the the DNS server to tell the client to ask GTM directly so we can use Topology-based responces. Currently the MS server is asking the GTM itself and then giving the client the response. The issue is that the Client and the DNS server are not always at the same site, to the Toppology Balancing is not always accurate.

 

 

Anyone know HOW to make the MS DNS server do this properly? The Microsoft support guys have been no help...

 

 

Thanks.

 

 

-Stephen
config
design

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  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Dec 17, 2007
    The client is the problem here, unfortunately. Microsoft clients issue recursive queries, which will always be handled by their primary/alternate DNS server. I'm not sure if this can be turned off, but that wouldn't have been an option anyway for my clients. In our environment, we point our clients directly to the GTM and forward all non-local requests to the Microsoft DNS servers. In the GTM named configuration, I added the bold lines under the listed headers:

    
options {
    forward only;
    forwarders {
        ;
        ;
        ;
    };
    allow-query {
        internal;
    };
    recursion yes;
};
acl internal {
    /;
};