[Samba] Best Practices: Samba AD with multiple DCs/BIND9 DNS servers

[Rowland Penny]

On Sun, 9 Oct 2016 00:18:27 -0400
PRIA IT <it at rockagencyllc.com> wrote:

> Here's a more detailed overview, both DCs are identical:
> 
> itwerks at jaaadc01:~$ uname -a
> Linux jaaadc01 3.13.0-96-generic #143-Ubuntu SMP Mon Aug 29 20:15:20
> UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
> 
> itwerks at jaaadc01:~$ lsb_release -a
> No LSB modules are available.
> Distributor ID: Ubuntu
> Description: Ubuntu 14.04.5 LTS
> Release: 14.04
> Codename: trusty
> 
> 
> named -V
> BIND 9.10.4-P1 <id:adfc588>
> running on Linux x86_64 3.13.0-96-generic #143-Ubuntu SMP Mon Aug 29
> 20:15:20 UTC 2016
> built by make with '--prefix=/usr' '--mandir=/usr/share/man'
> '--infodir=/usr/share/info' '--sysconfdir=/etc/bind'
> '--localstatedir=/var' '--enable-threads' '--enable-largefile'
> '--with-libtool' '--enable-shared' '--enable-static'
> '--without-openssl' '--with-gssapi=/usr/include/gssapi'
> '--with-dlopen=yes' '--with-gnu-ld' '--with-atf=no' '--enable-ipv6'
> '--enable-filter-aaaa' 'CFLAGS=-fno-strict-aliasing -DDIG_SIGCHASE
> -O2' compiled by GCC 4.8.4
> 
> 
> I just took a look at both DNS servers in RSAT's DNS snap-in, jaadc01
> has an entry I added manually the other day for jaavm01.  jaaadc02
> has no entry for that machine.
> 
> Let me know if I can provide any other information.
> 

Are you using Network-Manager ?

If so, you will also be using dnsmasq, stop Network-Manager from using
dnsmasq and remove any lines from /etc/hosts that start with '127.0.1.1'

Check what is in /etc/resolv.conf, it should be using itself for the
nameserver.

Rowland