Mastering Nginx: From Basics to Advanced Configurations and Security

What is Nginx?

Nginx is a free, open‑source, high‑performance HTTP server and reverse‑proxy product.

Key Features

Forward and reverse proxying

Load balancing

Web caching

Static‑dynamic content separation

Typical Use Cases

Personal or corporate websites (e.g., YC‑Framework site)

External gateway proxy (internal uses SpringCloud Gateway, external uses Nginx)

File services built on Nginx + FTP

Proxying backend service clusters with load‑balancing

Basic authentication for access control

Intranet mapping proxy

HTTPS configuration

Black‑white list filtering

Ecosystem – OpenResty

OpenResty is a popular platform built on Nginx and LuaJIT, extending Nginx functionality with a rich set of Lua libraries for more flexible web solutions.

Open‑Source Resources

Official website: https://nginx.org/en/

Official documentation: http://nginx.org/en/docs/contributing_changes.html

Source code repository: https://github.com/nginx/nginx

Common Configuration Examples

1. HTTPS Configuration

Example certificate setup for a website.

2. Redirect HTTP to HTTPS

Method 1:

Method 2:

3. Static Resource Mapping

4. Proxy Internal Middleware (e.g., MySQL)

5. Cross‑Origin Configuration

6. Connection Limiting

7. Download Speed Limiting

8. IP Access Restriction

Place this configuration in server or location blocks.

9. HTTP Basic Authentication

10. Timeout Settings

proxy_send_timeout 90;   # backend server send timeout
proxy_read_timeout 90;   # backend server read timeout

11. Handling Large Request Bodies

When the error 413 Request Entity Too Large occurs, increase the allowed size:

client_max_body_size 20m;

12. Load‑Balancing Strategies

Nginx supports six strategies: round‑robin, weight, ip_hash, least_conn, fair, url_hash.

Round‑robin:

Weight:

ip_hash:

Least connections:

Fair:

url_hash:

Security Hardening Strategies

1. Hide Nginx Version

server_tokens off;

2. Restrict HTTP Methods

Allow only GET and POST:

3. Custom Cache Settings

4. Filter Illegal User‑Agent

5. Block Unsupported URLs

6. Enforce Domain Access (SSL required)

7. Reduce User Privileges

8. Disable Directory Listing

9. Limit File Upload Size

client_max_body_size 18m;

10. Keep Track of Vulnerabilities

Monitor Nginx security advisories and update promptly. Download page: https://nginx.org/en/download.html

Architecture Overview

Core design aspects:

Modular design

Proxy architecture

Event‑driven model

Master‑process model

Worker‑process model

Startup Process

Source Code Directory Layout

Conclusion

The article provides a practical overview of Nginx, covering essential configuration snippets, security hardening techniques, and a high‑level view of its modular architecture, startup flow, and source‑code organization, enabling readers to apply Nginx effectively in various scenarios.