Nginx

Lightweight, high-performance web server and reverse proxy server originally written by Igor Sysoev and distributed under the 2-clause BSD License.

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Overview

nginx (pronounced "engine x") is a lightweight, high-performance web server and reverse proxy server originally written by Igor Sysoev and distributed under the 2-clause BSD License. It is known for its flexibility, low resource utilization, and ability to handle a large number of concurrent connections efficiently.

Beyond serving static content, nginx functions as a reverse proxy, content cache, load balancer, TCP/UDP proxy server, and mail proxy server. It supports modern protocols including HTTP/2, HTTP/3, and QUIC, and can be extended with modules for gzipping, SSL/TLS, FastCGI proxying, and scripting via njs. Enterprise distributions, commercial support, and training are available from F5, Inc.

nginx powers the world's most popular web server deployments, is consistently among the most popular Docker images, and serves as the foundation for multiple Kubernetes Ingress Controllers.

Key features

HTTP/2 and HTTP/3 support
Reverse proxy with caching
Load balancing and fault tolerance
SSL/TLS with SNI support
Modular architecture with extensive modules
Low memory footprint
FastCGI, uwsgi, SCGI proxying
njs scripting language
Mail proxy (IMAP, POP3, SMTP)
TCP/UDP proxy server

Pros

Extremely lightweight and efficient resource usage
Handles thousands of concurrent connections
Highly modular and extensible
Excellent performance and stability
Wide platform support (Linux, BSD, Solaris, Windows, macOS)
Active community and commercial support available
Flexible configuration system

Cons

Steeper learning curve for complex configurations compared to some alternatives
Less beginner-friendly documentation than some competitors
Requires recompilation for some module additions

Use this if

You need a lightweight, high-performance web server or reverse proxy for production environments, want to build a load balancer, or require efficient handling of high concurrent connections with minimal resource overhead.

Skip this if

You prefer a simpler, more beginner-friendly web server with less configuration complexity, or need built-in application server functionality without additional setup.

Best for

High-traffic web applicationsReverse proxying and load balancingStatic content deliveryAPI gateway and microservices routingMail proxy servicesTCP/UDP proxyingKubernetes ingress control

Alternatives

Apache HTTP ServerCaddyTraefikHAProxyEnvoy Proxy

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