Am I going to run into issues using Lets Encrypt SSL on WPMU? (Nginx)

Question

I can't begin building my WPMU server until this evening so I thought I would ask the question here to see if anyone has experience with this scenario.

Setting up a WordPress Multisite with Lets Encrypt SSL. Using Sub-directories.

I just want to ensure there is no issue with Common Name or something similar.

Answer 1

SSL Certificates have nothing to do with sub-directories, thus it will not matter. The Common Name in SSL identifies the host (Eg. www.example.com).

If you are using sub-domains it would still be easy to accomplish.

The example below will generate a single certificate for example.com, www.example.com, en.example.com and fr.example.com.

certbot-auto certonly --rsa-key-size 4096 --standalone -d example.com \
-d www.example.com -d en.example.com -d fr.example.com

In your nginx site configuration, you will specify the single certificate which will be valid for all the domains yous specified with certbot.

server {
    ...
    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
    ...
}