Transport Layer Security (TLS)


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?

TLS 1.3

DreamHost servers running Ubuntu Bionic or Debian Buster support TLS 1.2 and 1.3. View the following article to check which operating system your server is running.

TLS 1.2

Older virtual private servers (VPS) running Debian Stretch only support TLS 1.2. View the following article to check which operating system your server is running.

TLS 1.1

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.

View the Checking browser TLS support section below to ensure your browser is compatible with versions 1.2 and above.

Testing your website's support

If your website has an SSL certificate, you can test the TLS version at the following sites:

Checking browser TLS support

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

See also

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