SSH Connector Unsupported SFTP Version

[mwiegand]

Hi @coyleni,

that detail was not shared before but glad to know you tested that already. I tried checking the source code. On second thought, I believe this is not a cypher but actual SSH version issue. Hence the clear error message.

The error dialogue indicates that the server uses version 0 but common is version 3 (to my knowledge).

Try connecting to the server via shell in verbose mode to check if that assumption is correct:

SSH: ssh -v user@hostname or ssh -Q protocol-version
SFTP: sftp -vvv user@hostname
telnet: telnet hostname 22

PS: I just happen to have found a post providing more details you might be interested in @coyleni

SECURITY ISSUE: External SSH Tool node forces deprecated auth keys

Hello @RNovak , thanks for bringing this problem to our attention. We will rewrite the node with the 5.3 release of the KNIME Analytics Platform which is planned for summer. The plan is to rewrite the node completely. It will be based on the existing FTP Connector node which uses the Apache MINA library that supports current secure key types. Bye Tobias

Best
Mike