My preference? Have all your clients use BIND to resolve DNS (this gives access
to more advanced features like sortlisting, good query logging,
blacklisting/redirection through the RPZ mechanism, Anycast, etc.). Set up the
BIND instances as slaves for the AD zones, and have the AD folks add the BIND
instances to the apex NS records so that the DCs will trigger fast replication
to BIND via the NOTIFY extension to the protocol.
I’d never let a regular PC client use Microsoft DNS for resolving DNS. Perish
the thought!
Note that this approach, if implemented simply, doesn’t scale to large numbers
of BIND instances (because you don’t want to add dozens or hundreds of apex NS
records to the zone). Beyond a certain threshold, you’d want to set up a
multi-level slaving/NOTIFY hierarchy on the BIND side…
- Kevin
[FCA_Pantone_email]
----------------------------------------------------------------------
Kevin Darcy
NAFTA Information Security Projects
FCA US LLC
1075 W Entrance Dr,
Auburn Hills, MI 48326
USA
Telephone: +1 (248) 838-6601
Mobile: +1 (810) 397-0103
Email: [email protected]
From: bind-users [mailto:[email protected]] On Behalf Of Jeff
Sadowski
Sent: Wednesday, July 27, 2016 3:00 PM
To: [email protected]
Subject: Re: Multiple AD domains
should I setup 192.168.1.1 as slaves to these two domains would that fix it?
On Wed, Jul 27, 2016 at 12:56 PM, Jeff Sadowski
<[email protected]<mailto:[email protected]>> wrote:
On the samba mailing list they described setting up the DC as the NS and
forward to another machine for more rules.
This will work fine for one domain. Now lets say I have 2 domains.
If I setup forwarders like so on 192.168.1.1
zone "domainA" IN { type forward; forward only; forwarders { 192.168.2.1; }; };
zone "domainB" IN { type forward; forward only; forwarders { 192.168.3.1; }; };
It will cache entries for each domain and if a computer gets a different
address for dhcp it will update on the domain's DNS but the dns on 192.168.1.1
will have a cached entry untill it expires.
192.168.2.1 and 192.168.3.1 are setup to forward all other zones than their
domain names to 192.168.1.1
if I have DNS server set for all machines in domainA to 192.168.2.1 all
machines on domainA see any DNS changes to domainA imediately machines on
domainB are cached and can take time to clear out.
And
if I have DNS server set for all machines in domainB to 192.168.3.1 all
machines on domainB see any DNS changes to domainB imediately machines on
domainA are cached and can take time to clear out.
What is the best way to resolve this issue?
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