Re: connexion reject UPgrade cisco IOS
You seem to be trying to use SCP protocol. The SCP protocol implementation in WinSCP works only against Linux (or Linux resembling) servers.
See https://winscp.net/eng/docs/requirements#client
That might not be the case of your Cisco device.
Please try using SFTP.
See https://winscp.net/eng/docs/requirements#client
That might not be the case of your Cisco device.
Please try using SFTP.