SSL Configuration in Nginx

nginx proxy ssl certificate key settings
17 February 2025

Overview of SSL Configurations in Nginx


Hello friends! Today we want to talk about using the ngx_http_proxy_module in Nginx and configuring SSL-related settings. If you are also looking for a secure way to establish connections to other servers through Nginx, please stay with us until the end of this article.


First, it is important to know that using SSL (Secure Sockets Layer) certificates can significantly enhance the security of communications. However, correctly configuring these certificates on the Nginx server might be somewhat complex. Therefore, we are here to guide you.


One of the most important configurations you should pay attention to when using SSL certificates is the proxy_ssl_certificate_key. This key allows Nginx to connect to its target server securely and maintain the necessary security. Without this configuration, you may encounter numerous issues.


Next, we will provide a practical example of using proxy_ssl_certificate_key to clearly understand how it works. I hope this content helps you implement the proper configurations.


Code Example


server {
listen 443 ssl;
server_name example.com;

ssl_certificate /path/to/your/certificate.crt;
ssl_certificate_key /path/to/your/private.key;

location / {
proxy_pass https://backendserver.com;
proxy_ssl_certificate /path/to/your/proxy/certificate.crt;
proxy_ssl_certificate_key /path/to/your/proxy/private.key;
proxy_ssl_trusted_certificate /path/to/your/trusted/certificate.crt;
}
}

Code Explanation


In this code, we have set up an Nginx server with SSL support:




server {

This line starts the server block.




listen 443 ssl;

This tells Nginx to listen for SSL traffic on port 443.




server_name example.com;

This line specifies that the server will respond to the domain name example.com.




ssl_certificate /path/to/your/certificate.crt;

This indicates the path to the SSL certificate for the server.




ssl_certificate_key /path/to/your/private.key;

This indicates the path to the private key for the SSL certificate.




location / {

This block specifies the actions to be taken when requests are made to the server.




proxy_pass https://backendserver.com;

This forwards requests to the proxied server (proxy).




proxy_ssl_certificate /path/to/your/proxy/certificate.crt;

This specifies the SSL certificate for the proxy.




proxy_ssl_certificate_key /path/to/your/proxy/private.key;

This specifies the private key for the SSL proxy certificate.




proxy_ssl_trusted_certificate /path/to/your/trusted/certificate.crt;

This indicates the path to the trusted SSL certificate for proxy validation.




}

This ends the server block.


FAQ

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How can I install an SSL certificate in Nginx?

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Can I use Nginx as a reverse proxy?

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When should I use proxy_ssl_certificate?

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Is SSL configuration complex on Nginx?