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Selected cipher type not supported by server lovecreatesbea...@gmail.com 05-08-2008
Posted by smallpond on May 9, 2008, 11:59 am
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 lovecreatesbea...@gmail.com wrote:
>
>>lovecreatesbea...@gmail.com wrote:
>>
>>>Hi,
>>
>>>I'm getting "Selected cipher type not supported by server" error on
>>>this line
>>
>>> $cnn = Net::SSH::Perl->new($host);
>>
>>Are you tring to connect to an SSH-1 or SSH-2 host?
>>If not sure, report the error(s) you get from trying each.
>
>
> Hi, Thank you.
>
> I tried the following ciphers one by one and got the same error
> message: "Selected cipher type not supported by server Options ".
>
>
>>>The error occurs even when I specify all IDEA, DES, DES3, Blowfish,
>>>arcfour, blowfish-cbc, and 3des-cbc like this:
>
>
>>> $cnn = Net::SSH::Perl->new($host, cipher => "IDEA");
>
>
>
> I manually ssh login the host and check the version. Is OpenSSH_4.6p1
> an SSH1 or SSH2 implementation, or both?
>
> root@bx1200:/etc/ssh# ssh -V
> OpenSSH_4.6p1, OpenSSL 0.9.8d 28 Sep 2006
> root@bx1200:/etc/ssh#
>
> root user ssh login is enabled defaultly, right? So I don't su root,
> do I?
>

I normally disable root login, but its optional.


> The Cipher lines in ssh_config file are commented out as following.
> How can know its cipher settings?
>
> root@bx1200:/etc/ssh# grep Cipher ssh_config
> # Cipher 3des
> # Ciphers aes128-cbc,3des-cbc,blowfish-cbc,cast128-
> cbc,arcfour,aes192-cbc,aes256-cbc
> root@bx1200:/etc/ssh#
>
> [ Do I need to in my perl script issue "ssh -c <cipher_spec>" command
> before ...? Absolutely not! I am not ssh-connected with the host. What
> can I do? ]


The rule when you don't know what's wrong is to step back to the
earliest place that you get an error.

Most ssh supports protocol type 1 and 2 these days, but to narrow
down your problem, try each each individually. Let the cipher type
be the default for that protocol. So try each of these separately:

$cnn = Net::SSH::Perl->new($host, -protocol => '1');

$cnn = Net::SSH::Perl->new($host, -protocol => '2');

You may get a different error from each one which would be a clue
for what's wrong.
--S
** Posted from http://www.teranews.com **

Posted by lovecreatesbea...@gmail.com on May 13, 2008, 1:26 am
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> lovecreatesbea...@gmail.com wrote:
> > I manually ssh login the host and check the version. Is OpenSSH_4.6p1
> > an SSH1 or SSH2 implementation, or both?
>
> The rule when you don't know what's wrong is to step back to the
> earliest place that you get an error.
>
> Most ssh supports protocol type 1 and 2 these days, but to narrow
> down your problem, try each each individually. Let the cipher type
> be the default for that protocol. So try each of these separately:
>
> $cnn = Net::SSH::Perl->new($host, -protocol => '1');
>
> $cnn = Net::SSH::Perl->new($host, -protocol => '2');
>
> You may get a different error from each one which would be a clue
> for what's wrong.

Hi, thank you very much. When I specified protocol => '2' explicitly,
I was prompted with the message of missing perl modules:

my $ssh = Net::SSH::Perl->new("192.168.50.50", protocol => '2');
$ssh->login($user, $pass);
$ssh->cmd("hostname");
### Can't locate Math/Pari.pm in @INC

When I used `protocol=>'1' or didn't specify that parameter then I got
"Selected cipher type not supported by server Options". I downloaded
those from cpan and had them installed. Now it works.

Before I tried this successfully, I ever went to except script but
failed at last. So, thank you very much.

Posted by smallpond on May 13, 2008, 10:51 am
Please log in for more thread options
lovecreatesbea...@gmail.com wrote:
>
>>lovecreatesbea...@gmail.com wrote:
>>
>>>I manually ssh login the host and check the version. Is OpenSSH_4.6p1
>>>an SSH1 or SSH2 implementation, or both?
>>
>>The rule when you don't know what's wrong is to step back to the
>>earliest place that you get an error.
>>
>>Most ssh supports protocol type 1 and 2 these days, but to narrow
>>down your problem, try each each individually. Let the cipher type
>>be the default for that protocol. So try each of these separately:
>>
>>$cnn = Net::SSH::Perl->new($host, -protocol => '1');
>>
>>$cnn = Net::SSH::Perl->new($host, -protocol => '2');
>>
>>You may get a different error from each one which would be a clue
>>for what's wrong.
>
>
> Hi, thank you very much. When I specified protocol => '2' explicitly,
> I was prompted with the message of missing perl modules:
>
> my $ssh = Net::SSH::Perl->new("192.168.50.50", protocol => '2');
> $ssh->login($user, $pass);
> $ssh->cmd("hostname");
> ### Can't locate Math/Pari.pm in @INC
>
> When I used `protocol=>'1' or didn't specify that parameter then I got
> "Selected cipher type not supported by server Options". I downloaded
> those from cpan and had them installed. Now it works.
>
> Before I tried this successfully, I ever went to except script but
> failed at last. So, thank you very much.


It seems like in the last 30 years I haven't learned much about
programming, but I have learned about debugging. It tells you
where I spend most of my time.
--S
** Posted from http://www.teranews.com **

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