This issue may be related to the 2012 issue raised here and possibly may still be open:
I need to connect to an SFTP site using an ID and Public Key. I also need to do this via a Proxy that requires Authentication. Lastly I need to do this in an Automation.
What will work:
If I setup the SFTP Config as follows:
If I have Save Password not checked and no password in the Proxy Authentication section, if I interactively attempt to connect to the SFTP site, I get the following POP-UP:
This looks like it is asking for the password to the Site, but through trial and error I discovered it is asking for the Proxy Password. If I enter the Proxy Password then the connection is correctly established and I can interactively pull/push files.
What Will Not Work
I need to be able to store the Proxy Password in the FTP Config. If I edit the config, enter the Proxy Password and click the Save Password option I can no longer interactively or via an automation use the FTP Configuration. When I attempt to interactively open the connection, I get the following error:
When I looked at the FTPConnections.xml file, the proxy password is stored in the connection as clear text which is unusual since I noticed if I have a config that authenticates with User/Password, that password is encrypted in the FTPConnections.xml file. Here is the relevant Proxy section of the XML file:
Needless to say if I can't interactively connect to the site with this config, using it in an Automation is a non-starter.