SFTP SSH identification string error

Hi, We try to connect to an external SFTP server from our EM server, but get an error "the server response does not contain an ssh identification string" when trying to connect from the connections. Connection to the SFTP server from Filezilla (from desktop) works however! Others SFTP connections work from de EM server. Any idea how to fix this?

Hi.

Connection to the SFTP server from Filezilla (from desktop) works however!

Have you tried to connect to the SFTP server via Filezilla from the Server PC?
The vendor may have an allowlist of IPs that can connect.
Also, which EasyMorph Server version are you using?

Problem solved: We used the wrong port number! After changing that, it worked!