Reverse Proxy — Technology Wiki

Overview

Direct Answer

A reverse proxy is an intermediary server positioned between clients and backend application servers that intercepts incoming requests and distributes them to appropriate upstream servers. Unlike a forward proxy, which shields clients, a reverse proxy shields and manages backend infrastructure.

How It Works

Client requests arrive at the reverse proxy's public address; the proxy then forwards these requests to one or more backend servers based on configured routing rules, load-balancing algorithms, or content inspection. The proxy collects responses from backend servers and returns them to clients, often caching content or modifying headers transparently.

Why It Matters

Organisations deploy reverse proxies to achieve load distribution across multiple servers, improve application resilience through failover mechanisms, reduce backend server exposure to external threats, and accelerate content delivery via caching. This architecture enables horizontal scaling and simplifies SSL/TLS termination at the network edge.

Common Applications

Reverse proxies serve as API gateways routing requests to microservices, distribute web traffic across clustered application servers, protect internal systems in e-commerce and SaaS platforms, and manage request routing in content delivery networks. Common deployment scenarios include multi-region failover and session persistence for stateful applications.

Key Considerations

Reverse proxies introduce a single point of failure if not configured redundantly and require careful tuning of timeouts and connection pooling to avoid backend exhaustion. Practitioners must balance performance gains against added latency and complexity in monitoring distributed request paths.

Related in Infrastructure

VPN

Virtual Private Network — a technology creating a secure, encrypted connection over a less secure network like the internet.

SD-WAN

Software-Defined Wide Area Network — a virtualised network architecture that enables centralised management of geographically distributed networks.

5G

The fifth generation of mobile network technology offering higher speeds, lower latency, and massive device connectivity.

VLAN

Virtual Local Area Network — a logical grouping of network devices that communicate as if on the same physical network.

Proxy Server

An intermediary server that forwards requests between clients and other servers, providing security and caching.

More in Networking & Communications

Packet Sniffing

Protocols & Standards

The process of capturing and analysing data packets travelling across a network for monitoring or troubleshooting.

IPv6

Protocols & Standards

The most recent version of the Internet Protocol, providing a vastly larger address space than IPv4.

HTTP

Protocols & Standards

Hypertext Transfer Protocol — the application-layer protocol for transmitting hypermedia documents on the World Wide Web.

Routing Protocol

Protocols & Standards

A protocol that determines the optimal path for data packets to travel across interconnected networks.

Network Segmentation

Network Security

Dividing a computer network into smaller subnetworks to improve security and performance.

mTLS

Protocols & Standards

Mutual Transport Layer Security — a protocol where both client and server authenticate each other using certificates.

Network Topology

Protocols & Standards

The arrangement of elements such as nodes, links, and devices in a computer network.

Wi-Fi 6

Protocols & Standards

The sixth generation of Wi-Fi technology offering improved speed, capacity, and performance in dense environments.