I've been through the Jetpack installation procedure, but when I press the "Connect to WordPress.com" button, I get a message:
Your website needs to be publicly accessible to use Jetpack: site_inaccessible Error Details: The Jetpack server was unable to communicate with your site [HTTP 403]. Ask your web host if they allow connections from WordPress.com. If you need further assistance, contact Jetpack Support: http://jetpack.me/support/
Further research shows that the problem appears to be that my host, Namesco, blocks access to the xmlrpc.php file. But they suggest a workraround is that that file could be renamed. I have now renamed it as xmlrpc2.php, and attempting to access it with a browser no longer gives the "page no available" that it used to. I have, additionally, installed the plugin Rename XMLRPC and activated it. However, there is no change, Jetpack still will not connect.
Any other suggestions?