Go to Settings | Publishing:
and select a connection method:
Then, enter your settings:




When you're done, save your server details via the Save Settings button at the bottom, and republish your blog.
Notes:
- The default port numbers will be used (:21 for FTP and :22 for SFTP). Specifying an alternate port will not work.
- Do not include http:// or ftp:// in the server address or the path setting.