TLS 1.3 support need upgrade to some base software(httpd/openssl).
The software upgrade can be source build. But after maintain will be hard.

Good solution is OS replace newer version.
But that is becomes other problem for application softwares now working.

I think rebuild myht.org system with newer OS in local. And make upgrade plan.
Then TLS 1.3 support is after finish all that.


Umm... I'm fall pithole legacy problem for maintainace. (;_;)

I am unable to modify the ssl.conf file via ssh, so I decided to open a new topic here. TLS 1.3 have released in August 2018, but we are still on TLS 1.2. I think it’s time to upgrade now (as it does not cause massive changes on the site).

Just modify the /etc/httpd/conf.d/ssl.conf file and restart the web server.