Detect browser TLS compatibility

Question

We have a SSL website where the host has recently disabled older SSL protocols like TLS 1.0 and below. Depending on the browser, the site visitor gets a blank page or a cryptic

Answer 1

There are at least two web sites that will check the browser capabilities for you, including SSL Labs (https://www.ssllabs.com/ssltest/viewMyClient.html) and HowsMySSL (https://www.howsmyssl.com/). HowsMySSL also has a nice API that can be easily checked from JavaScript.