[Samba] Changing IP Scope on a Samba DC

Peter Pollock
Sat, 29 Aug 2020 06:54:20 -0000

Andrew, I very much appreciate your swift reply and your expertise. I
readily admit I'm a little out of my depth here. I'm sitting here in
California at almost midnight with just the weekend to get done all I need
to do on the network and I fear this may be derailing my plans.

This article on the Samba Wiki
https://wiki.samba.org/index.php/Changing_the_IP_Address_of_a_Samba_AD_DC seems
to suggest I need to demote and repromote if I change the address, is that
also the same if I change the subnet?

I'm sorry if that's a dumb question, but I'm having severe problems
with
these servers and I really don't want to screw anything up because I try
something stupid.

Peter

On Fri, Aug 28, 2020 at 11:21 PM Andrew Bartlett <abartlet at samba.org>
wrote:

> On Fri, 2020-08-28 at 21:02 -0700, Peter Pollock via samba wrote:
> > I've asked a couple of other questions on here, which people have
> > kindly
> > answered and I'm waiting for the opportunity to implement what
they
> > have
> > suggested.
> >
> > In the meantime:
> >
> > We are running out of IP addresses!
> > We currently use 192.168.2.0/24 and it's proving to not be enough
> > addresses.
> >
> > I'm considering changing to 192.168.4.0/22 to virtually quadruple
the
> > number of addresses we have available and hopefully keep us in
> > available
> > addresses for years to come.
> >
> > My question is: how hard is this to do in Samba? We have 3 DC's
and
> > from
> > what I read, I need to demote one, change the IP then re-promote
> > it... but
> > I'm guessing it then won't be able to talk to the others
because it
> > will be
> > on a different subnet.
> >
> > Is there any other way to do it, or is it just not possible?
> >
> > Thanks in advance for your help!
>
> G'Day Peter,
>
> Leaving aside the IP routing questions (that is just generic routing
> issues) Samba should just update it's address once it finds a new one.
>
> Samba can also listen on multiple IPs if they are local interfaces.
>
> But why not just change to 192.168.0.0/22 and so have IPs
> 192.168.0.0 - 192.168.3.255 and so not need to renumber?
>
> Anyway, not really our problem space.
>
> I hope this helps,
>
> Andrew Bartlett
>
> --
> Andrew Bartlett                       https://samba.org/~abartlet/
> Authentication Developer, Samba Team  https://samba.org
> Samba Developer, Catalyst IT
> https://catalyst.net.nz/services/samba
>
>
>
>