I followed the recipe to connect to devcloud through my pre-installed cygwin environment, but I can't get into devcloud. When I run the "ssh devcloud+proxy" I end up with the terminal blocked and when I hit return, ssh shows "protocol mismatch" and then I have to kill it through CTRL+C. Any idea on what might be wrong and/or how to fix this?
$ ssh -v devcloud+PROXY OpenSSH_8.1p1, OpenSSL 1.1.1d 10 Sep 2019 debug1: Reading configuration data /home/xyz/.ssh/config debug1: /home/xyz/.ssh/config line 257: Applying options for devcloud+PROXY debug1: Executing proxy command: exec nc -x proxy-ir.intel.com:1080 devcloud.intel.com 22 debug1: identity file /home/xyz/.ssh/devcloud-access-key-42705.txt type -1 debug1: identity file /home/xyz/.ssh/devcloud-access-key-42705.txt-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_8.1 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4 debug1: match: OpenSSH_7.4 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002 debug1: Authenticating to 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: firstname.lastname@example.org MAC: <implicit> compression: none debug1: kex: client->server cipher: email@example.com MAC: <implicit> compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ecdsa-sha2-nistp256 SHA256:A43Fccb1iM4pDwsT5OgjszJYHAJdaMmA4fV2hf1HmVo debug1: Host 'devcloud.intel.com' is known and matches the ECDSA host key. debug1: Found key in /home/xyz/.ssh/known_hosts:70 debug1: rekey out after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: rekey in after 134217728 blocks debug1: Will attempt key: /home/xyz/.ssh/devcloud-access-key-42705.txt explicit debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512> debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic debug1: Next authentication method: publickey debug1: Trying private key: /home/xyz/.ssh/devcloud-access-key-42705.txt debug1: Authentication succeeded (publickey). Authenticated to devcloud.intel.com (via proxy). debug1: Local connections to LOCALHOST:4022 forwarded to remote address c009:22 debug1: Local forwarding listening on ::1 port 4022. debug1: channel 0: new [port listener] debug1: Local forwarding listening on 127.0.0.1 port 4022. debug1: channel 1: new [port listener] debug1: channel 2: new [client-session] debug1: Requesting firstname.lastname@example.org debug1: Entering interactive session. debug1: pledge: proc debug1: client_input_global_request: rtype email@example.com want_reply 0 debug1: Remote: Forced command. SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.3 Protocol mismatch. debug1: client_input_channel_req: channel 2 rtype exit-signal reply 0 debug1: client_input_channel_req: channel 2 rtype firstname.lastname@example.org reply 0 ^Cdebug1: channel 2: free: client-session, nchannels 3 debug1: channel 0: free: port listener, nchannels 2 debug1: channel 1: free: port listener, nchannels 1 Connection to devcloud.intel.com closed. Transferred: sent 2712, received 2628 bytes, in 14.6 seconds Bytes per second: sent 185.7, received 180.0 debug1: Exit status -1
We tried connecting Devcloud through the Cygwin environment and it's working fine for us. Could you please follow the below steps.If you have done already,skip that step.
Step 1: Download CYGWIN: 64 bit version from https://www.cygwin.com/ and run the setup with the --no-admin option.
For more information on installation, please go through: https://devcloud.intel.com/datacenter/learn/connect-with-ssh-windows-cygwin/installation Note: If you have installed it already, skip to the next step.
Step 2: Open the Cygwin Terminal and set up SSH tunneling as described below for connecting to Intel AI Devcloud.
mkdir -p ~/.ssh mv ~/Downloads/devcloud-access-key-<user> ~/.ssh/
Host devcloud_proxy User uXXXXX HostName c009 Port 4036 IdentityFile "<path to>/.ssh/devcloud-access-key-XXXXX" ProxyCommand ssh -T devcloud-socks-proxy Host devcloud-socks-proxy User guest Hostname cluster.colfaxresearch.com IdentityFile "<path to>/.ssh/devcloud-access-key-XXXXX" LocalForward 4036 colfaxserver:22 ProxyCommand nc -x proxy-us.intel.com %h %p
Connect to devcloud:
Hopes this helps. Please feel free to reach out to us if you have any issues.