Hello!
I recently deployed a static website on Render with a custom domain name, and so far it’s been really nice. One issue I found though was in testing the TLS settings with SSL Labs, it shows that TLS 1.0 and 1.1 are enabled when being served using the custom domain. These protocols should really be disabled, they have security issues that cannot be fixed, and web browsers removed support for them in 2020. As far as compatibility is concerned, TLS 1.2 is currently supported by 98.8% of total web usage, including IE 11. Interestingly, the same static site being served using the *.onrender.com
subdomain correctly has TLS 1.0 and 1.1 disabled.
Render should really disable TLS 1.0 and 1.1 entirely, and probably disable some of the weaker TLS 1.2 cipher suites as well.
Thank you!