SSH / SFTP connection to JPMorgan (transmissions*.jpmorgan.com) fails. Why?
This is a known bug of their server software. It advertises support for keyboard-interactive authentication but if the client uses this authentication mechanism, the server returns error 11 and closes connection.
Solution: disable keyboard-interactive authentication using AuthenticationTypes property of the SSH and SFTP client components when connecting to this server (keyboard-interactive authentication is enabled in the components by default).