How to install a second SSL certificate?

Question

linux

There is a Bitrix virtual appliance version 5.1.8 server. An
SSL certificate for the main domain is installed there.
Now we have made a subdomain that links to the same site. A certificate was issued for him.
/etc/nginx/bx/site_avaliable contains a config containing a certificate for the main domain.
I created a config for the subdomain in the /etc/nginx/bx/site_ext_enabled folder, with the data of the second certificate written in, but I don’t want to use it.

Answer 1

You need a certificate for 2 domains.

Answer 2

Create a separate config to the Available site with a certificate and direct it to the same Bitrix and everything will work