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Possibilities of using Certbot for Nginx web Server

NGINX

What is certbot and why you would need to install it on nginx webserver

Certbot is software for issuing of non-paid LetsEncrypt SSL certificates. Today SSL-protection is industrial standard cause actual browsers are often marks unprotected sites as potential dangerous.



How to install Certbot

As example I will explain Certbot installation on the server under Ubuntu 20.04. So far as this software is common used, it is a part of OS repositories. And "one-step-install" is possible now. Just authorize as privileged user and run command below:

apt install -y python3-certbot-nginx

pic1

How to get the certificate

Cause the LetsEncrypt is owned by the Electronic Frontier Foundation you should a "point" your domain's A-records to your server and wait till changes is applied worldwide. To ensure just check current A-record via this command:

nslookup <your_domain_name> <any_public_DNS_server>

изображение_2023-04-27_171656998

Then ensure which service is listening web-port:

netstat -lptn | grep 80

pic3

As we see, our webserver is really nginx. So, we can issue the certificate via Certbot:

certbot --nginx -d yourdomain.tld -d www.yourdomain.tld -d anyothersubdomain.yourdomain.tld

You should see the picture like below:

pic5

To apply changes you need restart web-service:

systemctl nginx restart

pic6

Checking

To check the certificate open your website in browser, then you can see cerdificate brief or detailed info:

pic7 pic8

Conclusion

After this matherial reading you knew what is Certbot an how to issue valid certificate for your website via this software.

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