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Date:      Tue, 19 May 2015 06:53:02 -0600
From:      Dan Busarow <dan@fishcreekventures.com>
To:        Jaime Kikpole <jkikpole@cairodurham.org>
Cc:        "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject:   Re: SFTP doesn't work from a specific client
Message-ID:  <6C5D9AED-5CEB-45D8-B4EA-3398E3840A59@fishcreekventures.com>
In-Reply-To: <CA%2Bsg5RSrapEwdesz2T7hgDttbQ2qcM5LMG997=hUCn=OsUpedw@mail.gmail.com>
References:  <CA%2Bsg5RSrapEwdesz2T7hgDttbQ2qcM5LMG997=hUCn=OsUpedw@mail.gmail.com>

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> On May 19, 2015, at 6:41 AM, Jaime Kikpole <jkikpole@cairodurham.org> =
wrote:
>=20
> I have a system that pushes out data files via SFTP to a FreeBSD
> system each night.  I'm in the process of replacing that FreeBSD
> system (its really old & still runs 8.x.)  My issue is that the data
> source can't connect via SFTP, but other systems can.  When it tries,
> this appears in /var/log/auth.log:
>=20
> May 19 08:24:56 its1 sshd[38792]: error: PAM: authentication error for
> <USERNAME> from <IP ADDRESS>
> May 19 08:24:56 its1 sshd[38792]: error: Received disconnect from <IP
> ADDRESS>: 3: com.jcraft.jsch.JSchException: Auth cancel [preauth]
>=20
> When I test it from the system that pushes out the data, it prompts me
> to accept an SSH key and then tells me that it  failed to connect.
> Unfortunately, its a GUI and has basically no diagnostic data to work
> from.
>=20
> I get the same results when I try to make the data source do SFTP
> conenctions to other systems, including some that are 10.1-RELEASE-p9
> and some that are 10.1-RELEASE-p10.  The weird thing is that I can use
> command line SFTP from any other location (including other FreeBSD
> systems and even a MacOS 10.9 system at home) to connect to these
> FreeBSD systems and everything works.  I can connect, authenticate,
> and even ls and cd around the file system.
>=20
> This feels like the data sending software is expecting something that
> isn't setup on the FreeBSD 10.1 systems, but is setup on the FreeBSD
> 8.x system.  I just don't know what.
>=20
> Any thoughts on how to diagnose this?
>=20

No ideas for diagnosis.

But my guess would be that your failing system is using SSH protocol 1 =
and your 10.1 system does not have protocol 1 enabled.

sshd_config

# The default requires explicit activation of protocol 1
#Protocol 2

Dan

>=20
> --=20
> Jaime Kikpole
> Network Administrator
> Cairo-Durham Central School District
>=20
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> help@cairodurham.org
> go.cairodurham.org/techtips
>=20
> --=20
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