With FTP protocol you can use Anonymous login. If you do not fill the password and other authentication methods fail (password authentication has the lowest preference), you will be prompted for password then. Also do not fill the password if you are going to use other authentication method (like public key). If you decide to do so nevertheless, do not forget to force password storing on the Save session as dialog. You are advised not to fill it in if you are going to save the site. The Password box is for the password associated with the account. 2 You can use environment variables in the value with syntax %NAME%. If you do not fill the username, you will be prompted for username then. The Username box is where you type your account name on the server. 1 Otherwise WinSCP selects the standard port number for you. You need to specify it only in rare circumstances, when the server uses non standard protocol. The Port number box lets you specify which port number on the server to connect to. You can use environment variables in the value with syntax %NAME%. Host name is the only mandatory box that must be filled for a session to open. The Host name box is where you type the name, or the IP address, of the server you want to connect to. When WebDAV protocol is selected, you can choose between basic unsecured variant and secure one. When FTP protocol is selected, you can further specify to use basic unsecured variant ( No encryption) or one of methods to invoke FTPS. The File protocol selection lets you choose transfer protocol.

How to login to scp filezilla