samba - Jul 2024 - SAMBA with IPv4/IPv6 dual stack

Good day

I would like to setup a SMB file server and DC that uses IPv4 and IPv6 dual
stack.
However I see certain problems; for instance, when the IPv6 prefix is
dynamic, this means the IPv6 of the DC would also dynamically change.

Is there something special I should consider when provisioning a SAMBA AD
DC with IPv6, or will it "just work" ?

Thanks,
best
Tobias

On Wed, 3 Jul 2024 09:03:27 +0200
"Pluess, Tobias via samba" <samba at lists.samba.org> wrote:
> Good day
> 
> I would like to setup a SMB file server and DC that uses IPv4 and
> IPv6 dual stack.
> However I see certain problems; for instance, when the IPv6 prefix is
> dynamic, this means the IPv6 of the DC would also dynamically change.
Your DCs IP shouldn't change, this sounds like your external IP is
changing, you also shouldn't connect any Samba machine directly to the
internet.
> 
> Is there something special I should consider when provisioning a
> SAMBA AD DC with IPv6, or will it "just work" ?
It will probably work with IPv6, but being old, I cannot see the point
to IPv6 internally, do you really have/need over 16 million computers ?

It is your choice however, so give it a try.

Rowland

Hi,

Am 03.07.24 um 09:03 schrieb Pluess, Tobias via samba:
> Good day
> 
> I would like to setup a SMB file server and DC that uses IPv4 and IPv6 dual
> stack.
> However I see certain problems; for instance, when the IPv6 prefix is
> dynamic, this means the IPv6 of the DC would also dynamically change.
sounds like you want to use a prefix that is dynamically assigned from 
your Internet provider for internal servers. Basically this should work, 
but you need to be sure DNS is updated every time the prefix and in 
result the Host IPv6 address changes. I don't think there is a 
implementation within SAMBA to automatically reflect those changes as it 
is not a good idea to have changing addresses on SAMBA servers.
That brings me to an alternative for internal addressing when your 
assigned prefix is dynamic: Use ULA addresses for your internal 
services. That works well with SAMBA.
With IPv6 it is fine (and even designed behaviour) to have multiple 
addresses per interface with different routes, so your hosts can have an 
ULA address for communication with your services and addresses from your 
ISP assigned prefix for external communication.
> Is there something special I should consider when provisioning a SAMBA AD
> DC with IPv6, or will it "just work" ?
It just works, at least if your addresses are static. When your SAMBA 
host has an ULA and dynamic external addresses I'd look that it is only 
listening on the ULA address.

   Regards
     Bernhard
> 
> Thanks,
> best
> Tobias

On 2024-07-03 at 09:03 +0200 Pluess, Tobias via samba sent
off:
> I would like to setup a SMB file server and DC that uses IPv4 and IPv6 dual
> stack.
> However I see certain problems; for instance, when the IPv6 prefix is
> dynamic, this means the IPv6 of the DC would also dynamically change.
> 
> Is there something special I should consider when provisioning a SAMBA AD
> DC with IPv6, or will it "just work" ?
you should internally use a fixed unique local address prefix if you only
otherwise have a dynamically assigned public prefix for your domain.

Bj?rn
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