From: William Dudley <wfdud...@gmail.com>
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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 canrCOt 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 didnrCOt 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
>>
>>
>>
>> ------------------------------------------------------------
>> ------------------
>> Check out the vibrant tech community on one of the world's most
>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
>> _______________________________________________
>> Freedos-user mailing list
>> Freedos-user@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/freedos-user
>>
>
> ------------------------------------------------------------
> ------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> _______________________________________________
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> Freedos-user@lists.sourceforge.net
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>
>
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<div dir="ltr">Karen,<div><br></div><div>If you know how to get ssh2d386 to
connect to a modern openssh, as on Ubuntu 16.04,</div><div>please share the
recipe with us!</div><div><br></div><div>Thanks,</div><div>Bill
Dudley</div><div><br></div></div><div class="gmail_extra"><br
clear="all"><div><div class="gmail_signature"
data-smartmail="gmail_signature">This email is free of malware because I run
Linux.</div></div>
<br><div class="gmail_quote">On Thu, Jan 26, 2017 at 9:10 PM, Karen Lewellen
<span dir="ltr"><<a href="mailto:klewel...@shellworld.net";
target="_blank">klewel...@shellworld.net</a>></span> wrote:<br><blockquote
class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">Well, if you have given up no point in my sharing.<br>
We use the same edition of Ubuntu, both with dreamhost who has my office, and
here at shellworld.<br>
While the latter requires me to make use of a few ssh2021b options, the -g
option-a for example, I encounter no issues.<br>
I am going to guess that-a things like machine speed, mine is a p3 with allot
of memory, impacts your situation.<br>
nor, I would hope, your-a location in the world.<br>
Sorry I did not notice your post before you abandoned-a the effort.<br>
Kare<div class="HOEnZb"><div class="h5"><br>
<br>
<br>
On Fri, 27 Jan 2017, Ulrich Hansen wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
Am 26.01.2017 um 18:19 schrieb Karen Lewellen <<a
href="mailto:klewel...@shellworld.net";
target="_blank">klewel...@shellworld.net</a>>:<br>
<br>
As I am presently writing this e-mail using ssh2d386 from the ssh2dos<br>
package ssh2021b,-a perhaps I can help you troubleshoot.<br>
</blockquote>
<br>
Hi Karen!<br>
<br>
I am using the exact same program and version.<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
for the record, I am not using freedos, but-a the ms dos 7.10 package<br>
mentioned on this list.<br>
Still every day several times a day I connect-a to two different servers<br>
using-a this package.<br>
</blockquote>
<br>
I guess your servers still run OpenSSH in versions earlier than 6.9.<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
may I ask again what your issue is presently?<br>
</blockquote>
<br>
Actually I have given up on it. I spent another day trying to get it to work,
but without success.<br>
<br>
The problem is that I canrCOt connect to an Ubuntu 16.04 LTS server with
OpenSSH 7.2.<br>
<br>
SSH2D386 gives the message:<br>
<br>
-a -a Expected KEX_DH_GEX_GROUP<br>
-a -a DH key exchange failed<br>
<br>
The server logs:<br>
-a -a Jan 27 00:02:22 ubuntu-VirtualBox sshd[2651]: error: kex protocol error:
type 30 seq 1 [preauth]<br>
-a -a 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<br>
<br>
As I wrote I already had problems connecting to a Debian 8 server with OpenSSH
6.7.<br>
But there I could fix it with these lines in /etc/ssh/sshd_config on the
server.<br>
<br>
-a -a Ciphers aes128-cbc<br>
-a -a KexAlgorithms diffie-hellman-group-exchange-<wbr>sha1<br>
-a -a MACs hmac-sha1<br>
-a -a HostKeyAlgorithms ssh-css<br>
<br>
But in OpenSSH 7.2 this didnrCOt work.<br>
<br>
What else did I try?<br>
<br>
I tried to set MTU=576 in C:\FDOS\WATTCP.CFG.<br>
<br>
I tried to recompile OpenSSH.<br>
The first time with adding this line in in compat.c:<br>
-a -a { "SSHDOS*",-a -a -a -a -a -a -a -a SSH_OLD_DHGEX },<br>
The second time with this one:<br>
-a -a { "SSHDOS*",-a -a -a -a -a -a -a -a
SSH_BUG_NOREKEY|SSH_BUG_FIRSTK<wbr>EX },<br>
<br>
Both were not able to let SSH2D386 connect. It worked great with other SSH
clients.<br>
<br>
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].<br>
<br>
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.<br>
<br>
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.<br>
<br>
cheers<br>
Ulrich<br>
<br>
<br>
[1] <a href="https://forums.red-gate.com/viewtopic.php?f=198&t=78958";
rel="noreferrer"
target="_blank">https://forums.red-gate.com/vi<wbr>ewtopic.php?f=198&t=78958</a><br>
[2] <a
href="http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/rfc4419.html";
rel="noreferrer"
target="_blank">http://www.chiark.greenend.org<wbr>.uk/~sgtatham/putty/wishlist/<wbr>rfc4419.html</a><br>
<br>
<br>
<br>
------------------------------<wbr>------------------------------<wbr>------------------<br>
Check out the vibrant tech community on one of the world's most<br>
engaging tech sites, SlashDot.org! <a href="http://sdm.link/slashdot";
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______________________________<wbr>_________________<br>
Freedos-user mailing list<br>
<a href="mailto:Freedos-user@lists.sourceforge.net";
target="_blank">Freedos-user@lists.sourceforge<wbr>.net</a><br>
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rel="noreferrer"
target="_blank">https://lists.sourceforge.net/<wbr>lists/listinfo/freedos-user</a><br>
</blockquote>
</div></div><br>------------------------------<wbr>------------------------------<wbr>------------------<br>
Check out the vibrant tech community on one of the world's most<br>
engaging tech sites, SlashDot.org! <a href="http://sdm.link/slashdot";
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target="_blank">https://lists.sourceforge.net/<wbr>lists/listinfo/freedos-user</a><br>
<br></blockquote></div><br></div>
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