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Date:      Tue, 20 Feb 2001 00:01:39 +0100 (CET)
From:      "Walter W. Hop" <walter@binity.com>
To:        FreeBSD bugs <freebsd-bugs@freebsd.org>
Subject:   OpenSSH <-> SSH.com's SSH2 incompatible?
Message-ID:  <Pine.BSF.4.33.0102192330400.22640-300000@surreal.nl>

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--0-2051247766-982623422=:22640
Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
Content-ID: <Pine.BSF.4.33.0102192357401.22640@surreal.nl>

Hi all,

after the ssh advisory of last week I have patched a box and tried if
SSH2 works out. All good at first sight, but I can't get the
FreeBSD-supplied OpenSSH and SSH.com's client/servers to talk to
eachother.

[connect with ssh.com client to OpenSSH server]

% ssh -V
ssh: SSH Secure Shell 2.4.0 (non-commercial version) on i386-unknown-freebsd4.0
% ssh <opensshbox>
warning: Authentication failed.
Disconnected; MAC error (Message authentication check fails.).

[connect with OpenSSH client to ssh.com server]

% ssh -V
SSH version OpenSSH_2.2.0, protocol versions 1.5/2.0.
Compiled with SSL (0x0090581f).
% ssh -2 <sshbox>
Disconnecting: Corrupted HMAC on input.

Attached are the 'verbose' outputs of both commands.

Several other SSH2 clients (including some of ssh.com's own clients)
are able to connect to both servers without problems. I guess this might
be just a configuration error, if so, as probably lots of other people
have deployed ssh.com's toolset, it might be advisable to change the
default configuration..

I don't know if I should send this to the OpenSSH people because they're
already 0.3 versions ahead ;-)

grtx,
walter

-- 
 Walter W. Hop <walter@binity.com> | +31 6 24290808 | PGP key: 0x84813998




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