When connecting to your website via FTP, you must include your username in the address.

When you try to connect to your website without using a login name, the server assumes you are trying to log in anonymously and will time out (refuse connection) due to recent security upgrades to our servers.

As a result: ftp://yourdomain.tld  WILL NO LONGER WORK

You must now use:  ftp://user@yourdomain.tld
where: user is the FTP user you created and yourdomain.tld is your domain name.

You will then be prompted for your password.

Alternately, you can bypass the password prompt with:  ftp://user:password@yourdomain.tld/