How to activate 2 ports 80 & 4000 for a single SSL enabled domain?

Question

I am new to SSL encryptions and need help! (Using cert bot).

I recently activated SSL on a website that runs on apache and linux on port 80. So, the current website looks like:

http://example.com --> https://example.com (done)

However, I have backend running on port 4000 and want to encrypt that as well to avoid "Mixed Content" page error:

http://example.com:4000 --> https://example.com:4000 (Not done yet)

This is exactly what I need and no work around would help. Please guide.

Thanks in advance! :-)

Answer 1

You can create a new subdomain subdomain.example.com and point it to example.com:4000 and then request a new SSL certificate from LetsEncrypt and specify multiple subdomains when requesting a certificate using certbot.

certbot certonly --webroot -w /var/www/example/ -d www.example.com -d example.com -w /var/www/other -d other.example.net -d another.other.example.net

When you have the certificate and key, add it in your webserver config

Check out the official certbot documentation here