Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer (SSL), are cryptographic protocols that provide secure communications on the Internet for such things as web browsing, email, faxing, instant messaging, and other data transfers.
For an overview of why you should add an SSL certificate to your site, view the following article:
Which versions of TLS are available at DreamHost?
As of January 29th 2018, DreamHost no longer supports TLS 1.0 on its web servers. If you're still using a browser that is only able to connect using TLS 1.0, you will not be able to view websites hosted at DreamHost using HTTPS. This means any site using an SSL certificate.
To check what versions of TLS your web browser supports, view the following site:
|Browser||Versions that do not support TLS 1.1 or 1.2|
|Chrome||21 and lower|
|Edge||All versions are ok|
|Firefox||26 and lower|
|Internet Explorer||10 and lower|
|Safari||6 and lower|
DreamHost supports TLS 1.2 so you can communicate with payment companies such as PayPal. If your website has an SSL certificate, you can test the TLS version at the following sites: