On Sat, May 30, 2020 at 04:19:02PM -0400, Joseph C. Sible wrote:
> On Sat, May 30, 2020 at 4:15 PM William Lallemand
> <[email protected]> wrote:
> >
> > On Sat, May 30, 2020 at 03:41:51PM -0400, Joseph C. Sible wrote:
> > > Anyway, when max < TLSv1.2, I think we should make min default to max.
> > > I think this is what you mean by "fallback on min = max", but I'm not
> > > 100% sure.
> >
> > That's exactly what I meant!
> >
> > > I don't mind the warning (since servers shouldn't ever have
> > > the max below TLSv1.2 today), but at the same time, I don't really see
> > > much value in it either.
> >
> > In my opinion the warning is important because the configuration
> > will behave differently depending on the HAProxy version you use.
> >
> > For example, in 2.1 with "ssl-max-ver TLSv1.1" alone, HAProxy will
> > accept both TLSv1.0 and TLSv1.1. If we do this change in 2.2, the same
> > configuration will only accept TLSv1.1. I think this kind of
> > configurations is ambiguous so it's better to emit a warning if the max
> > if lower thant the default min.
> 
> Ah, the loss of TLSv1.0 with just "ssl-max-ver TLSv1.1" is a good
> point. I agree that that is worth a warning.
> 

Thanks for the valuable input, I'll make a patch.

-- 
William Lallemand

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