Hi Bill,
While I appreciate your desire for wisdom, I feel rather sure my specific
situation will not apply to anyone else here most likely.
I use ssh2d386 to access at least one commercial shell, but those shell
services are maintained by others. I am not for example accessing my own
server.
If the servers you desire reaching are run by other people, give me an
example and I will try.
If my many years of computing has taught me anything is that the word
Personal is important for a reason.
Kare
On Thu, 26 Jan 2017, William Dudley wrote:
Karen,
If you know how to get ssh2d386 to connect to a modern openssh, as on
Ubuntu 16.04,
please share the recipe with us!
Thanks,
Bill Dudley
This email is free of malware because I run Linux.
On Thu, Jan 26, 2017 at 9:10 PM, Karen Lewellen <klewel...@shellworld.net>
wrote:
Well, if you have given up no point in my sharing.
We use the same edition of Ubuntu, both with dreamhost who has my office,
and here at shellworld.
While the latter requires me to make use of a few ssh2021b options, the -g
option for example, I encounter no issues.
I am going to guess that things like machine speed, mine is a p3 with
allot of memory, impacts your situation.
nor, I would hope, your location in the world.
Sorry I did not notice your post before you abandoned the effort.
Kare
On Fri, 27 Jan 2017, Ulrich Hansen wrote:
Am 26.01.2017 um 18:19 schrieb Karen Lewellen <klewel...@shellworld.net>:
As I am presently writing this e-mail using ssh2d386 from the ssh2dos
package ssh2021b, perhaps I can help you troubleshoot.
Hi Karen!
I am using the exact same program and version.
for the record, I am not using freedos, but the ms dos 7.10 package
mentioned on this list.
Still every day several times a day I connect to two different servers
using this package.
I guess your servers still run OpenSSH in versions earlier than 6.9.
may I ask again what your issue is presently?
Actually I have given up on it. I spent another day trying to get it to
work, but without success.
The problem is that I can???t connect to an Ubuntu 16.04 LTS server with
OpenSSH 7.2.
SSH2D386 gives the message:
Expected KEX_DH_GEX_GROUP
DH key exchange failed
The server logs:
Jan 27 00:02:22 ubuntu-VirtualBox sshd[2651]: error: kex protocol
error: type 30 seq 1 [preauth]
Jan 27 00:02:22 ubuntu-VirtualBox sshd[2651]: error: Received
disconnect from 192.168.1.110 port 645:3: Expected KEX_DH_GEX_GRO
As I wrote I already had problems connecting to a Debian 8 server with
OpenSSH 6.7.
But there I could fix it with these lines in /etc/ssh/sshd_config on the
server.
Ciphers aes128-cbc
KexAlgorithms diffie-hellman-group-exchange-sha1
MACs hmac-sha1
HostKeyAlgorithms ssh-css
But in OpenSSH 7.2 this didn???t work.
What else did I try?
I tried to set MTU=576 in C:\FDOS\WATTCP.CFG.
I tried to recompile OpenSSH.
The first time with adding this line in in compat.c:
{ "SSHDOS*", SSH_OLD_DHGEX },
The second time with this one:
{ "SSHDOS*", SSH_BUG_NOREKEY|SSH_BUG_FIRSTKEX },
Both were not able to let SSH2D386 connect. It worked great with other
SSH clients.
The idea was that SSH2DOS uses code from PuTTY and there were already
several exceptions in combat.c for old PuTTY versions. The reason seems to
be that OpenSSH implemented RFC4419 and old PuTTY versions and SSH2DOS did
not. See [1], [2].
I even looked at the SSH2DOS source code. But I have no experience with
OpenWatcom. I installed it but gave up, when I saw I also had to compile
the WATT32 TCP/IP stack.
SSH2DOS uses PuTTY code, which is also Free Software. So in theory it
should be possible to replace the old PuTTY code with a more recent one.
cheers
Ulrich
[1] https://forums.red-gate.com/viewtopic.php?f=198&t=78958
[2] http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/
rfc4419.html
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