Re: [Freedos-user] SSH - unsupported remote protocol version

[geneb]

On Tue, 2 Jan 2018, Dan Schmidt wrote:


Drat!  Somebody finally caught onto to my evil plan to covertly make Linux
servers insecure!  Foiled again!  You will this one, Tom, but I'll be
back!!  Oh, I'LL BE BACK!!

You can almost hear him adjust his monocle while petting a white persian 
cat. ;)


g.

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Re: [Freedos-user] SSH - unsupported remote protocol version

[Dan Schmidt]

Drat!  Somebody finally caught onto to my evil plan to covertly make Linux
servers insecure!  Foiled again!  You will this one, Tom, but I'll be
back!!  Oh, I'LL BE BACK!!

On Tue, Jan 2, 2018 at 9:03 AM, Tom Ehlert  wrote:

>
> > We did talk at length about it almost exactly a year ago.  The tldr
> > version is that you would need ssh2d386 and you have to have access
> > to modify the ssh config on the server to support older ciphers.
>
> there are GOOD reasons to not allow outdated protocols to be used.
> on what planet have you been living the last years?
>
> > All my attempts to get a decent C coder interested in updating the
> project have failed.
>
> > https://sourceforge.net/p/freedos/mailman/message/35629497/
>
> I'm not surprised
>
> Tom
>
>
> 
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Re: [Freedos-user] SSH - unsupported remote protocol version

[Tom Ehlert]

> We did talk at length about it almost exactly a year ago.  The tldr
> version is that you would need ssh2d386 and you have to have access
> to modify the ssh config on the server to support older ciphers. 

there are GOOD reasons to not allow outdated protocols to be used.
on what planet have you been living the last years?

> All my attempts to get a decent C coder interested in updating the project 
> have failed. 

> https://sourceforge.net/p/freedos/mailman/message/35629497/

I'm not surprised

Tom


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Re: [Freedos-user] SSH - unsupported remote protocol version

[Tom Ehlert]

> On 12/31/2017 10:47 AM, Robert Riebisch wrote:
>> From SSHDOS source code:
>> ###
>>if(remote_major != 1 && remote_minor == 0)
>>   fatal("Unsupported remote protocol version\n");
>> ###

> What a weird check. So version 2.1 would work? Shouldn't the check be

not only a weird and buggy check, this programmer could have given
some more - and helpful - information like


  {
  printf(
 "Unsupported remote protocol version\n"
 " this programm supports only SSL 1.0\n"
 " the remote server requires %u.%u",
  remote_major, remote_minor);

  ...
  }


but he decided otherwise. May he live in peace and empty trash bins for
the rest of his life ...


Tom


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Re: [Freedos-user] SSH - unsupported remote protocol version

[Dan Schmidt]

We did talk at length about it almost exactly a year ago.  The tldr version
is that you would need ssh2d386 and you have to have access to modify the
ssh config on the server to support older ciphers.  All my attempts to get
a decent C coder interested in updating the project have failed.

https://sourceforge.net/p/freedos/mailman/message/35629497/


On Sun, Dec 31, 2017 at 11:57 PM, Rugxulo  wrote:

> Hi,
>
> On Sun, Dec 31, 2017 at 5:27 PM, Jerome Shidel  wrote:
> >
> > Anyhow, I recall seeing a thread earlier discussing something similar.
> At least, I think it was similar.
> > I was not very interested at the time and kinda only skimmed it. But, if
> I remember what I half glimpsed,
> > it involved something about having to add some older protocols to the
> server.  But, I’m probably mis-remembering it.
> >
> > Sorry, I really can’t be much more help than that.
>
> I'm a networking noob overall, but 
>
> Wasn't something like this discussed earlier this year, mainly by
> Ulrich Hansen? A quick search of my email archives shows a few
> messages from him about it.
>
> So maybe wait for him to chime in. (Or email him privately? Or just
> search the mailing list archives for it.)
>
> 
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Re: [Freedos-user] SSH - unsupported remote protocol version

[Rugxulo]

Hi,

On Sun, Dec 31, 2017 at 5:27 PM, Jerome Shidel  wrote:
>
> Anyhow, I recall seeing a thread earlier discussing something similar. At 
> least, I think it was similar.
> I was not very interested at the time and kinda only skimmed it. But, if I 
> remember what I half glimpsed,
> it involved something about having to add some older protocols to the server. 
>  But, I’m probably mis-remembering it.
>
> Sorry, I really can’t be much more help than that.

I'm a networking noob overall, but 

Wasn't something like this discussed earlier this year, mainly by
Ulrich Hansen? A quick search of my email archives shows a few
messages from him about it.

So maybe wait for him to chime in. (Or email him privately? Or just
search the mailing list archives for it.)

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Re: [Freedos-user] SSH - unsupported remote protocol version

[Jerome Shidel]

> Are you sure?
> Binaries are still from 2003 (sshdos.zip) or 2006 (ssh2dos.zip).

I am only sure that one package reports itself as SSHDOS v0.95, and it is not 
the package that shipped with FreeDOS 1.2.

But, I haven’t used either. I don’t want to speculate on what the differences 
between them could be. 

As a general rule, it is usually a good idea to check it if there is an update 
that may solve a problem. Unfortunately, it often does not. But, it usually 
doesn’t hurt. Usually...

Anyhow, I recall seeing a thread earlier discussing something similar. At 
least, I think it was similar. I was not very interested at the time and kinda 
only skimmed it. But, if I remember what I half glimpsed, it involved something 
about having to add some older protocols to the server.  But, I’m probably 
mis-remembering it.

Sorry, I really can’t be much more help than that. 

Jerome

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Re: [Freedos-user] SSH - unsupported remote protocol version

[Robert Riebisch]

Hi Jerome,

> http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/repositories/1.2/pkg-html/group-net.html
> 
> At present, FDIMPLES is an offline only package manager and several
> packages (including sshdos & ssh2dos) have been updated since the
> release of FreeDOS 1.2.

Are you sure?
Binaries are still from 2003 (sshdos.zip) or 2006 (ssh2dos.zip).

Robert Riebisch
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Re: [Freedos-user] SSH - unsupported remote protocol version

[Robert Riebisch]

Hi David,

>> From SSHDOS source code:
>> ###
>>if(remote_major != 1 && remote_minor == 0)
>>  fatal("Unsupported remote protocol version\n");
>> ###
> 
> What a weird check. So version 2.1 would work? Shouldn't the check be
> 
> if (!(remote_major == 1 && remote_minor == 0))
> 
> ?

Not sure, what the author is trying to achieve. The whole project lacks
documentation.

Robert Riebisch
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Re: [Freedos-user] SSH - unsupported remote protocol version

[David McMackins]

On 12/31/2017 10:47 AM, Robert Riebisch wrote:
> From SSHDOS source code:
> ###
>if(remote_major != 1 && remote_minor == 0)
>   fatal("Unsupported remote protocol version\n");
> ###

What a weird check. So version 2.1 would work? Shouldn't the check be

if (!(remote_major == 1 && remote_minor == 0))

?


Happy Hacking,

David E. McMackins II
Supporting Member, Electronic Frontier Foundation (#2296972)
Associate Member, Free Software Foundation (#12889)

www.mcmackins.org www.delwink.com
www.eff.org www.gnu.org www.fsf.org

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Re: [Freedos-user] SSH - unsupported remote protocol version

[Jerome Shidel]

First, 

I would suggest visiting the Official FreeDOS Online Software Repository.

http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/repositories/1.2/pkg-html/group-net.html

At present, FDIMPLES is an offline only package manager and several packages 
(including sshdos & ssh2dos) have been updated since the release of FreeDOS 1.2.

Once you download the packages, you can use the FDINST command line utility to 
remove the old package and install the new one(s).

fdinst remove sshdos 
fdinst install sshdos.zip

Jerome

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Re: [Freedos-user] SSH - unsupported remote protocol version

[Robert Riebisch]

Hi czezz,

> In both cases, connection fails and in the end I get message:
> "Unsupported remote protocol version".

>From SSHDOS source code:
###
   if(remote_major != 1 && remote_minor == 0)
fatal("Unsupported remote protocol version\n");
###
So, the remote server has to support 1.0.

1) Did you try the -v switch for verbose mode?
2) What server is on the remote site?

Robert Riebisch
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