Proxy Server
Servers & Server SoftwareProxy Server is an intermediary server that receives client requests, forwards them to destination servers, and returns responses on the client’s behalf. It can hide the client’s IP address, enforce access policies, cache content to reduce latency, and filter traffic for security. In hosting environments, proxies are commonly used for reverse proxying, load distribution, and protecting origin servers from direct exposure.
How It Works
A proxy server sits between a client and another server. With a forward proxy, the client connects to the proxy, which then requests resources from the internet and relays the response back. This can centralize outbound traffic, apply authentication, log activity, and mask the client’s public IP address from the destination.
With a reverse proxy, the proxy is placed in front of one or more origin servers (for example, web servers running Apache or Nginx). Visitors connect to the proxy’s public endpoint, and the proxy routes requests to the appropriate backend based on rules such as hostname, path, headers, or health status. Reverse proxies often terminate TLS, compress responses, cache static assets, and enforce rate limits or web application firewall policies.
Why It Matters for Web Hosting
Proxy capabilities affect performance, security, and scalability of a hosting plan. A reverse proxy can reduce load on your origin server through caching and connection management, simplify HTTPS by handling certificates centrally, and add protection against abusive traffic. When comparing hosting options, look for support for reverse proxy setups, TLS termination, HTTP/2 or HTTP/3 compatibility, caching controls, and whether you can configure rules (headers, redirects, allowlists) without breaking application behavior.
Common Use Cases
- Reverse proxying a web app to hide the origin server and expose a single public endpoint
- Load balancing across multiple backend servers for higher availability and horizontal scaling
- TLS termination and certificate management in one place, with HTTP to backends
- Caching static content (images, CSS, JS) to reduce backend CPU and improve response times
- Security controls such as IP allowlists, rate limiting, bot filtering, and request size limits
- Forward proxying for controlled outbound access from internal networks or containers
Proxy Server vs Load Balancer
A load balancer focuses on distributing incoming traffic across multiple backends, typically using algorithms like round robin or least connections plus health checks. A proxy server is broader: it can forward or reverse traffic, rewrite requests, cache responses, and enforce security policies. In practice, many reverse proxies can act as load balancers, but not all load balancers provide full proxy features like content caching or header manipulation.