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I have an implementation of IBM's disk virtualization technology in my environment - SVC (SAN Volume Controller). The device is managed by either GUI or CLI. In order to use CLI, a 1024-bit RSA public key needs to be uploaded for the user to authenticate against.

I am able to authenticate against the SVC cluster using SSH clients like PuTTY and OpenSSH. I am also able to connect to the SVC cluster using Tectia SSH version 4.x. The problem arises when I try authenticating against the cluster using Tectia verison 6.x. I keep getting an error of "Request exec channel error: Operation failed."

When I set debugging to be a bit more verbose, I do see one line that stands out to me:

debug: 24/08/2010 14:12:23:730 BrokerConnection/broker_connection.c:1033/broker_connection_auth_notify_cb: Authentication successful.

So, if I'm reading correctly, I do get authenticated okay to the cluster using my private/public key pair. However, the next few lines proceed to disconnect me from the SVC cluster:

debug: 24/08/2010 14:12:23:733 BrokerConnection/broker_connection.c:228/broker_connection_disconnect_cb: Remote disconnect. Reason 2: bind: Permission denied
debug: 24/08/2010 14:12:23:734 BrokerServer/broker_server.c:1360/ssh_secsh_broker_server_open_exec: Exec '(null)' failed
24/08/2010 14:12:23:734 SshSecShBroker/secsh_broker.c:684/ssh_secsh_broker_packet_cb: Got channel exit notification
24/08/2010 14:12:23:735 SshSecShBroker/secsh_broker.c:2357/ssh_secsh_broker_open_exec_internal: REPLY_ERROR received, code 1: (null)
Request exec channel error: Operation failed.

Has anyone here tried using Tectia SSH with an IBM SVC cluster and managed to get it to work?



asked Aug 24 '10 at 18:25

David%20Bosiljevac's gravatar image

David Bosiljevac

We have some customers that are using 6.x Tectia client against an IBM SVC cluster without problems.

Could this be failing when it tries to open an agent forwarding channel? Does it work if you try connecting with agent forwarding disabled? such as:

sshg3 -a user@server

Can you post more of the debugging output, specially the lines leading up to the failure and the command line options (if any) that are used for the connection?


answered Aug 25 '10 at 13:49

Roman's gravatar image

Roman ♦♦

That was the trick! It's connecting just fine now to our SVC cluster.

Thanks for your help!

(Aug 25 '10 at 14:55) David Bosiljevac David%20Bosiljevac's gravatar image
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Asked: Aug 24 '10 at 18:25

Seen: 8,512 times

Last updated: Aug 25 '10 at 13:49

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