400: The Plain Http Request Was Sent To Https Port

When working with proxy servers in an HTTP environment, it's not uncommon to encounter issues related to SSL/TLS encryption. However, despite the growing importance of HTTPS/HTTP protocols, many institutions and organizations are still struggling to configure their proxy servers correctly.

One common challenge is setting up a proxy server that can handle multiple protocols simultaneously, without any conflicts or issues arising from incompatible configuration settings.

Fortunately, Nginx is an excellent choice for configuring proxy servers. Here's why:

• Nginx supports both HTTP and HTTPS protocols, making it a versatile option for institutions with mixed traffic.
• Nginx has a large community of users and developers who contribute to its core development, ensuring that the software remains secure and up-to-date.

To configure Nginx as a proxy server, you'll need to create an SSL/TLS certificate for your institution's domain. This will enable your proxy server to establish secure connections with clients using HTTPS/HTTP protocols.

Here are the steps to follow:

• Create a Let's Encrypt SSL/TLS certificate for your institution's domain using tools like Nginx or OpenSSL.

In addition to setting up HTTPS/HTTP protocols, it's also essential to configure your proxy server to handle multiple request headers and parameters. This can be achieved by using techniques such as header rewriting or parameter extraction.

Some popular tools for handling multiple request headers and parameters include NGINX's built-in support for header rewriting and the use of plugins like mod_header or mod_rewrite.

Source Reference:

Conferences.Law.Stanford.edu/IPsummerschool2022/2013/12/29/porta-est-nascetur-proin

Source Reference (2):

Nginx.com