[gnutls-help] issue with Windows 2008r2 Ldap

Nikos Mavrogiannopoulos nmav at gnutls.org
Tue Dec 29 14:04:09 CET 2015

On Mon, Dec 28, 2015 at 12:03 PM, Hilitec <andre at liechti.net> wrote:
> Seyeong Kim <seyeong.kim <at> canonical.com> writes:
>> Hello
>> I have an issue with gnutls ( maybe not ) and Windows 2008r2 Ldap
>> when I tried to ldapsearch to windows ldap, I got below message
>> TLS: can't connect: A TLS packet with unexpected length was received..
>> there are two AD, 2008r2, 2012r2 and I could only see this error on 2012r2
> + ubuntu 14.xx combination
>> I checked gnutls version
>> libgnutls26 | 2.12.23-12ubuntu2.3
>> libgnutls-deb0-28 | 3.3.8-3ubuntu3   | vivid
>> Is there any commits I can refer to this issue?
>> I know there are large differences between two versions. so I need an advice.
> GnuTLS and SChannel (Microsoft) implementations are not (yet) compatible for
> TLS 1.2 negotiation during AD/LDAPS binding.

That's the first time I see something like that. As far as I know
schannel and gnutls are fully compatible with TLS 1.2. Is there any
bug report or more information on that incompatibility that you


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