On Sun, Sep 25, 2011 at 8:35 PM, Andrew Scott <[email protected]> wrote:
> Ok so it kind of makes sense what your saying, but this is internal so I am
> not worried too much about external access from anyone other than me.
> So lets take Computer A, this is my primary DNS and technically my only DNS.
> Although a VPS on Computer B is running a DNS it is there because of a Plesk
> installation, and maintaining my internal domains.
> Now the primary DNS does send or forward to Computer B - VPS, any requests
> and also out my router/gateway.
> Now the one thing I just did yesterday, was to remove the AD from and demote
> Computer A as a Domain Controller. Since then I have actually been very
> stable touch wood, that this may have been the issue.
>

Ok so your problem and what I described is the same problem just with
different symptoms due to the lack of an public internet connection.

I actually have three dns servers for my network.  My ISP provided
link to the outside world.  My primary internal DNS provided by
dnsmasq.  And I have a Windows domain for testing and such.

All my machines have the same IP range.

What I did was set up to different DNS domain names.

Dnsmasq hands out a domain say myhome.net when it give out a dhcp
address to all comers.

Those machines that are members of the windows domain have their dns
servers changed to myhomewin.net

dnsmasq is configured to forward requests for myhomewin.net to the
windows DNS server, and myhomewin.net is configured to forward
myhome.net to the dnsmasq server before looking out to the internet.

This kind of configuration is doable, but its a pain to diagnose, and
sometimes an even bigger pain to fix.  Of course ideally each network
only had one internal dns, but thats not all that likely with
complicated setups.

Rance

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