Installing SSL/TLS certificate

• A lot of the domain providers should provide an SSL certificate.
• Cloudflare privides a free SSL certificate upon setting it up as a dns. Also, when using Cloudflare make sure to use the reverse proxy service of Cloudflare and CDN and other domain and server security (like DDOS) features of Cloudflare.
• You can also install a free SSL certificate by “Let’s Encrypt” which is a project of EFF. The procedure is as follows.

sudo apt install -y certbot python-certbot-apache python-certbot-nginx

# Install the certificate by providing the webserver technology name. We can also use "--nginx".

sudo certbot --apache

# This will detect connected domains to this server and ask to install certificates for the domains. It will allow to install certificates for multiple domains connected to the server.