Unabble to access Intel Devcloud with ssh

[Serafina]

Hi,

I created my account for the devcloud yesterday and I tried to access the cloud after launching the script for the automatic ssh configuration,

but using the standard command:

ssh -v devcloud

I got this error:
OpenSSH_7.6p1 Ubuntu-4ubuntu0.6, OpenSSL 1.0.2n 7 Dec 2017
debug1: Reading configuration data /home/serafina/.ssh/config
debug1: /home/serafina/.ssh/config line 23: Applying options for devcloud
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Executing proxy command: exec ssh -T -i ~/.ssh/devcloud-access-key-159897.txt guest@ssh.devcloud.intel.com
debug1: key_load_public: No such file or directory
debug1: identity file /home/serafina/.ssh/devcloud-access-key-159897.txt type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/serafina/.ssh/devcloud-access-key-159897.txt-cert type -1
debug1: permanently_drop_suid: 1000
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.6
Received disconnect from 12.229.61.118 port 22:2: Too many authentication failures
Disconnected from 12.229.61.118 port 22
ssh_exchange_identification: Connection closed by remote host

Then I tried the command below:

(base) serafina@serafina-N501VW:~$ ssh -v -XY -o IdentitiesOnly=yes -T -i /home/serafina/.ssh/devcloud-access-key-159897.txt guest@ssh.devcloud.intel.com
OpenSSH_7.6p1 Ubuntu-4ubuntu0.6, OpenSSL 1.0.2n 7 Dec 2017
debug1: Reading configuration data /home/serafina/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to ssh.devcloud.intel.com [12.229.61.118] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/serafina/.ssh/devcloud-access-key-159897.txt type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/serafina/.ssh/devcloud-access-key-159897.txt-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.6
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.2p1 Ubuntu-4ubuntu0.5
debug1: match: OpenSSH_8.2p1 Ubuntu-4ubuntu0.5 pat OpenSSH* compat 0x04000000
debug1: Authenticating to ssh.devcloud.intel.com:22 as 'guest'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:fdh1CzIao2MCh6YQ3uP7ZZyZF0XqieU7OY6DjcDctq4
debug1: Host 'ssh.devcloud.intel.com' is known and matches the ECDSA host key.
debug1: Found key in /home/serafina/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,sk-ssh-ed25519@openssh.com,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ecdsa-sha2-nistp256@openssh.com>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/serafina/.ssh/devcloud-access-key-159897.txt
debug1: Authentication succeeded (publickey).
Authenticated to ssh.devcloud.intel.com ([12.229.61.118]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: pledge: exec
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug1: Remote: /opt/ssh/getkey %f:1: key options: agent-forwarding command permitopen port-forwarding pty user-rc x11-forwarding
Warning: No xauth data; using fake authentication data for X11 forwarding.
debug1: Requesting X11 forwarding with authentication spoofing.
debug1: Sending environment.
debug1: Sending env LANG = it_IT.UTF-8
SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.3

But it got stalled.

Can it depend on the settings that I have in the /etc/ssh/ssh_config?

I attached this file (as ssh_config.txt) so you can have a look at it.

I would really appreciate any help.

Thank you in advance,

Serafina

[RemyaP_Intel]

Hi,

Thank you for posting in Intel Communities.

Your issue might be due to corrupted ssh key. So, you can download the "devcloud-access-key-xxxxxx.txt" file again and try connecting to devcloud. 

If your key is not corrupted, make use of the same key to login to devcloud server. For that follow the below steps:

1. Delete the existing .ssh directory.

      rm -r ~/.ssh

2. Create a new ~/.ssh directory, and move the private SSH key into permanent storage in ~/.ssh as follows:

      mkdir -p ~/.ssh

      mv <path to downloaded key>/devcloud-access-key-xxxxxx.txt ~/.ssh/

3. Create the config file again in ~/.ssh folder as mentioned in the documentation(https://devcloud.intel.com/oneapi/documentation/connect-with-ssh-linux-macos/)

4. Manually verify whether the key file is present in the ~/.ssh folder and set correct permissions as below:        

      chmod 600 ~/.ssh/devcloud-access-key-xxxxxx.txt

      chmod 600 ~/.ssh/config

The above steps are from the Manual Configuration of devcloud connection documentation. For further reference : https://devcloud.intel.com/oneapi/documentation/connect-with-ssh-linux-macos/

[Note : Please make sure that the correct path and name of the key is provided in the config file.]

Try the above steps and if the issue persist please let us know.

Regards,

Remya Premdas

[Serafina]

Hi, I tried your suggestion,

and I have canceled everything in the dir .ssh, leaving only the public key downloaded from the intel website,

but still I am not able to access the devcloud .

If I run the command:

ssh -v devcloud

I got the output:

OpenSSH_7.6p1 Ubuntu-4ubuntu0.6, OpenSSL 1.0.2n 7 Dec 2017
debug1: Reading configuration data /home/serafina/.ssh/config
debug1: /home/serafina/.ssh/config line 1: Applying options for devcloud
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Executing proxy command: exec ssh -T -i ~/.ssh/devcloud-access-key-159897.txt guest@ssh.devcloud.intel.com
debug1: permanently_drop_suid: 1000
debug1: key_load_public: No such file or directory
debug1: identity file /home/serafina/.ssh/devcloud-access-key-159897.txt type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/serafina/.ssh/devcloud-access-key-159897.txt-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.6
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.6p1 Ubuntu-4ubuntu0.3
debug1: match: OpenSSH_7.6p1 Ubuntu-4ubuntu0.3 pat OpenSSH* compat 0x04000000
debug1: Authenticating to devcloud:22 as 'u159897'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:7R/nUuhf2mWQej8YRr+FNr0T0++Rw71wmvZpsrysbFU
debug1: Host 'devcloud' is known and matches the ECDSA host key.
debug1: Found key in /home/serafina/.ssh/known_hosts:3
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/serafina/.ssh/devcloud-access-key-159897.txt
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
u159897@devcloud: Permission denied (publickey).

Can it be due to some configuration setting that I have in the file /etc/ssh/ssh_config ?

I attached below a screenshot of the content of this file.

Thank you for your time,

Best regards,

Serafina

[RemyaP_Intel]

Hi,

We are working on this. We will get back to you soon.

Regards,

Remya Premdas

[RemyaP_Intel]

Hi,

The public key permission denied error was due to a bug on the web portal SSO introduced Thursday July 14th at ~1pm and resolved at ~10am July 15th. In fixing this bug, if you are still getting this error, please down load the public key as shown in the credentials email

Regards,

Remya Premdas

[fcharras]

Hi Remya,

I'm still unable to connect. Downloading the ssh key again does not help, the file is the same than before.

Could you maybe reset my user (u160428) so I can get a new, not bugged ssh key ?

Thanks in advance

fcharras

[ogrisel]

I have the exact same problem (my username is `u155032`). I redownloaded and re-run the ssh setup script after having deleted my previous key and config. I still get:

```

$ ssh devcloud
u155032@devcloud: Permission denied (publickey).

```

[RemyaP_Intel]

Hi,

Sorry to keep you waiting. We have informed devcloud admin team. They are looking into the issue. 

Regards,

Remya Premdas

[RemyaP_Intel]

Hi Serafina,

We received an update that your issue has been resolved. Could you please check and confirm us.

--

Regards,

Remya Premdas

[RemyaP_Intel]

Hi,

Is the issue resolved? Could you please give us an update.

[ogrisel]

The issue was resolved for my account. Thank you very much!

[RemyaP_Intel]

Hi Serafina,

Glad to know your issue is resolved. This thread will no longer be monitored by Intel. If you need further assistance, please post a new question.

Regards,

Remya Premdas