[Date Prev][Date Next] [Chronological] [Thread] [Top]

Re: ITS#6475

<masarati@aero.polimi.it> wrote:

> > access to * attrs=cmusaslsecretOTP
> >     by dn.regex="cn=replica,o=test" write stop
> >     by * break
> This is orthogonal to the sasl auxprops discussion.  It's a matter of
> well-configuring the authorizing identity in slapo-chain(5).

I pointed it here for future reference because this is an unusual case.
I suspect everyone configure replicas with universal read-only access.
For this to work, replica must also have write access to
> > Another point: bind on the replica is impossible when the master is
> > down. I understand this is to prevent replaying the same OTP on multiple
> > replicas, but that defeats the purpose of setting up replicas for fail
> > over.
> This was clearly pointed out at the beginning of the discussion.  You
> can't have both, it should be clear.

Yes, I understand that.

> Right now, cmusaslsecretOTP is hardcoded, because if the shadow copy is
> used, OTP breaks.  If it is acceptable to have it broken, we can remove
> the hardcoding, and let admins decide whether they prefer fail-over over
> consistency.  I'd have no doubt, and favor consistency.

When you tell about using the shadow copy, the modification will still
be sent to the master, right? Such a behavior allows replays attacks
within the modification propagation time frame, but it ensures that bind
are still possible when then master is down. I think it could be
interesting to have a configuration setting for that.

Emmanuel Dreyfus