I am so happy you could help him!
To answer your question for myself, I never have this issue. No crashes,
and i can spend hours working on line. Further I have done more than my
share of downloads with sftpd386 as well.
Kare
On Fri, 27 Jan 2017, Dan Schmidt wrote:
I am equally as stunned - I will remember this day as the day I tried to
help somebody on the internet and they said "thank you" instead of flaming
or ignoring me.
My ssh2dos is very unstable - it usually crashes on exit or after five to
ten minutes. Do you have this issue as well? I am curious if I should try
a different version of DOS.
On Fri, Jan 27, 2017 at 12:04 AM, Ulrich Hansen <my.gr...@mailbox.org>
wrote:
Wow. I am stunned. This has solved the problem. I have spent more than a
day searching for such a solution.
I am now able to log into a Ubuntu 16.04 LTS server with OpenSSH 7.2
Client is a fresh install of FreeDOS 1.2 where I installed ssh2dos with
"FDNPKG install ssh2dos"
Thank you very, very much!
Ulrich
Am 27.01.2017 um 06:39 schrieb Dan Schmidt <helpdesk...@gmail.com>:
I forgot - you may need to regenerate your keys with "ssh-keygen -A" after
modifying the server.
On Thu, Jan 26, 2017 at 10:38 PM, Dan Schmidt <helpdesk...@gmail.com>
wrote:
I am unsure what it is that makes ssh2dos so unstable for me - nobody
else has this issue?
I would like to answer Ulrich on how he can modify his Ubuntu server, but
first, a warning: These algorithms were disabled because they are obsolete
and insecure. Using a token based login, such as google-authenticator, may
be advisable if your server is public facing.
Firstly, add this to your server's /etc/ssh/sshd_config:
KexAlgorithms diffie-hellman-group1-sha1,curve25519-sha...@libssh.org
,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-
hellman-group-exchange-sha256,diffie-hellman-group14-sha1
Ciphers 3des-cbc,blowfish-cbc,aes128-cbc,aes128-ctr,aes256-ctr
HostKeyAlgorithms +ssh-dss
Then, make use of the -g option - it goes BEFORE your username in
ssh2dos. You should now be able to connect.
I do not know why simply adding +diffie-hellman-group1-sha1 doesn't work,
it seems it should. Also, I was in a rush - I may be excluding some newer
options - report back if you find/add them with success.
-Dan
On Thu, Jan 26, 2017 at 9:42 PM, Karen Lewellen <klewel...@shellworld.net
wrote:
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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