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Can I Disable HTTP/2?
Yes, HTTP/2 is enabled by default for SSL listeners configured from “httpd.conf”, but can be disabled per virtual host via the “SpdyEnabled” directive.
To do this, include the following in your SSL virtual host configuration using a virtual host level include file
<IfModule LiteSpeed> SpdyEnabled off </IfModule>
You can find more information on virtual host include files for your specific control panel here:
cPanel, Plesk, DirectAdmin