Pantheon provides free development sites for all projects. As of today, we're happy to also offer SSL service for all sites in development as part of our free service.
Using this feature should be as simple as changing the protocol of your URL to "https". For instance, the dev environment for our DNS checking utility is at dev-dnscheck.gotpantheon.com. It's got HTTPS right here.
For older sites that are using the "dev-dot" prefix, rather than a dash, we're happy to reset your hostname so you can take advantage of this new feature. More information is available on the helpdesk.Topics: Security, Drupal