If I change the node to List remote files the same problem happens even if I increase the timeout.
I am not an expert in proxy connections but I use a VPN to access the company remotely. However, I think that if something could be interfering with the connection then it should not be accessed from an sftp client which I only configure the user and host credentials.
VPN should not be an issue.
(at least if you can do it manually with an ssh client while connected)
But if the increased timeout does not work then i can only guess how to fix the problem
I think you can google for jsch and your error for detailed explenations on the error message (should be the java library behind the node)
But in general I think the connection does not go through to the server)
can you do the following in the cmd/console on your machine (if you are using Windows)
actually hoped this would fail - so the issue would become clearer
But at least the connection and login should not be the problem
Maybe the last thing I can think of is trying a newer knime version (there is a new SSH node in 4.3)
e.g. just download the zip version of 4.3 and try if it works with the updated SSH node https://www.knime.com/downloads/download-knime
In general I used the 4.1 version quite alot - and it should work
Maybe someone else has any idea what else could be the problem