Curious problem with CIFS on AIX

Richard Sharpe realrichardsharpe at
Fri Nov 14 19:55:55 MST 2014

On Fri, Nov 14, 2014 at 4:46 PM, Jeremy Allison <jra at> wrote:
> On Fri, Nov 14, 2014 at 11:19:54AM -0800, Richard Sharpe wrote:
>> We are seeing an AIX system unable to authenticate because we respond
>> to the NegProt with LANMAN 1.0 as the selected protocol, even though
>> the client said that it also supported NT LM 0.12. As a result the
>> client wants to use NTLM not NTLMv2 auth.
>> This seems to be because they also said they support Samba and we
>> stopped when we saw Samba.
>> Is this a known issue? I am trying to use 'min protocol = NT1' as a
>> way to force the selection of NT LM 0.12 and thus force NTLMv2.
> No, not known. Can you log a bug with a reproducer so I can
> get it fixed ?

smbclient is a reproducer ...  Samba 4.1.12 ... selects NT LANMAN 1.0
rather than NT LM 0.12.

Of course, I might be wrong about that causing AIX to assume that
NTLMv2 cannot be used.

I will open a bug. Curious.

Richard Sharpe

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