Re: [exim] DNS Question - Advanced

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Autor: Jan-Piet Mens
Fecha:  
A: Marc Perkel
Cc: exim users
Asunto: Re: [exim] DNS Question - Advanced
On Wed Jun 07 2006 at 04:31:00 CEST, Marc Perkel wrote:

> So - here's my tricky question. I have 2 DNS servers. Server A runs
> MyDNS - a MySQL driven server. It's the one that does the work behind
> the scenes. It has no caching and should be considered to be slow.
>
> Server B is a regular DNS server set up for caching and running BIND.
> It's the one that will be the public face for the blacklist providing
> caching for Server A so as not to load down Server A.
>
> So what I want is that Server B secretly knows where Server A is so that
> any request of dnsbl.junkemailfilter.com goes to Server B and Server B
> passes the request on to Server A and caches it reducing the load on
> Server A and keeling it hidden from the world.
>


How about setting B (BIND) up as a secondary to A? In B's named.conf you'd
have

zone "dnsbl.junkemailfilter.com" {
        type slave;
        file "dnsbl.junkemailfilter.com";
        masters { ip-address-of-A; };
};


Regards,
    -JP