When connecting to the DevCloud for oneAPI
$ ssh devcloud @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the ED25519 key sent by the remote host is SHA256:/Dlip01tdMyRmhMDc870Z4Uk7AancwwoTnbb0EZajK0. Please contact your system administrator. Add correct host key in /home/<user_name>/.ssh/known_hosts to get rid of this message. Offending ECDSA key in /home/<user_name>/.ssh/known_hosts:# Host key for ssh.devcloud.intel.com has changed and you have requested strict checking. Host key verification failed. kex_exchange_identification: Connection closed by remote host Connection closed by UNKNOWN port 65535
Cause:
DevCloud have just migrated oneAPI DevCloud to a new SSH tunnel server and upgraded the SSH server version to OpenSSH _8.2p1. For this reason the DevCloud are unable to reuse the old SSH fingerprint for the new server.
Remediation:
Step 1: Remove the Offending FingerPrint(s)
Method 1: rename your existing ~/.ssh/known_hosts file to something else, such as ~/.ssh/known_hosts.yymmdd
$ mv ~/.ssh/known_hosts ~/.ssh/known_hosts.220623
Method 2: remove the offending host SSH fingerprint only:
$ ssh-keygen -R ssh.devcloud.intel.com # Host ssh.devcloud.intel.com found: line 1 # Host ssh.devcloud.intel.com found: line 2 # Host ssh.devcloud.intel.com found: line 3 /home/<user_name>/.ssh/known_hosts updated. Original contents retained as /home/<user_name>/.ssh/known_hosts.old
Step 2: reconnect to the DevCloud and accept the new key.
$ ssh devcloud The authenticity of host 'ssh.devcloud.intel.com (12.229.61.118)' can't be established. ED25519 key fingerprint is SHA256:/Dlip01tdMyRmhMDc870Z4Uk7AancwwoTnbb0EZajK0. This key is not known by any other names Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added 'ssh.devcloud.intel.com' (ED25519) to the list of known hosts.