openssh unix dev - Mar 2012 - Host Key verification issue

Hello, 
I have script that I run remotely on a server, using ssh config with a
'command'  call in the authorized keys file. I can successfully run this
from one of my servers, but when I try from 2 other machines, I receive a Host
Key Verification Failed error.

When I remove the 'command' from the call from authorized keys on the
remote server, I can successfully connect to the server. For security reasons, I
do not want to do a direct connection to the server.

I have removed the server name from the known_hosts file and still I cannot get
this to work.

Has anyone seen this issue before? 

In verbose mode, it gets through to the sending of the command, then fails: 

debug1: Sending command: <command parameters>
debug2: channel 0: request exec confirm 1
debug2: fd 3 setting TCP_NODELAY
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug3: Wrote 224 bytes for a total of 2037
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: exec request accepted on channel 0
debug2: channel 0: rcvd ext data 31
Host key verification failed.
debug2: channel 0: written 31 to fed 6

Any idea why this would fail? 

Cheers, and thanks for any insight you may have. 
Heather

Hi Heather,

On Fri, 16 Mar 2012, Mckinnon, Heather (Heather) wrote:
> I have script that I run remotely on a server, using ssh config with a 
> 'command' call in the authorized keys file. I can successfully run
this
> from one of my servers, but when I try from 2 other machines, I receive 
> a Host Key Verification Failed error.
Does the script behave differently depending on which server it's called 
from?
> In verbose mode, it gets through to the sending of the command, then fails:
>
> debug1: Sending command: <command parameters>
> debug2: channel 0: request exec confirm 1
> debug2: fd 3 setting TCP_NODELAY
> debug2: callback done
> debug2: channel 0: open confirm rwindow 0 rmax 32768
> debug3: Wrote 224 bytes for a total of 2037
> debug2: channel 0: rcvd adjust 2097152
> debug2: channel_input_status_confirm: type 99 id 0
> debug2: exec request accepted on channel 0
> debug2: channel 0: rcvd ext data 31
> Host key verification failed.
> debug2: channel 0: written 31 to fed 6
I think the secure channel to the server is already open at this point, so 
the "Host key verification failed" message is being output by the
command
that you're running on the remote server.

Perhaps it's SSHing to another server whose host key it hasn't saved
yet,
or which has changed?

Cheers, Chris.
-- 
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\  __/ / ,__(_)_  | Chris Wilson <chris+sig at qwirx.com> Cambs UK |
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