SOLVED Enable SNI for Primary Domain

[DHarry]

My "primary domain" is receiving an odd 421 Misredirect Error.

The full error reads: " The client needs a new connection for this request as the requested host name does not match the Server Name Indication (SNI) in use for this connection. "

In WHM, under the Manage SSL Host section, the primary domain, it the "Is SNI Required?" field is marked "No".

I imagine this pertains to my error in some way but if so, is there a way to mark it "Yes"? I've read the documentation here but I don't see a way to configure this section: https://docs.cpanel.net/whm/ssl-tls/manage-ssl-hosts/

 

[cPanelAaronH]

Hello,

cPanel has supported and enabled SNI since version 11.38 or newer as long as the server is running CentOS 6 or higher. Is the server currently running http2?

rpm -qa |grep ea-apache24-mod_http2.x86_64

 

[DHarry]

Thanks @cPanelAaronH

I was able to figure it out. It was an error within my CDN and unrelated to the server itself.

Take care and stay safe, I really appreciate it!

 

[cPanelAaronH]

Excellent! I am glad to hear this.