I am using KNIME 4.5.1.
I have a workflow that was using the SSH Connector successfully to connect to an SFTP server.
I updated this node to connect to a replacement SFTP server.
Now I receive Unsupported sftp Version 0 (SshException):
However, the same exact connection setup for this server is successful in the SSH Connector (Legacy) node and allows me to download the target file.
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: