Privacy · 5 min read · May 15, 2026

What is a Proxy Server and How Does It Work?

A proxy server sits between you and the internet, forwarding your requests under a different IP. Here's how proxies work, their types, and when to use one.

A proxy server is one of the oldest tools for hiding your identity online. Long before VPNs became mainstream, proxies were the go-to method for bypassing restrictions and masking your IP. They're still widely used today — but they work very differently from a VPN, and the distinction matters.

What is a Proxy Server?

A proxy server is an intermediary server that sits between your device and the internet. Instead of connecting directly to a website, your request goes to the proxy first. The proxy forwards the request to the website, receives the response, and sends it back to you.

From the website's perspective, the connection came from the proxy's IP address — not yours. For background on why your IP matters, see what your IP address reveals →

How a Proxy Works

Without a proxy:

Your device → Website (sees your real IP)

With a proxy:

Your device → Proxy server → Website (sees proxy IP)

The website sees the proxy's IP address and location. Your real IP is hidden — at least from the destination website.

Types of Proxy Servers

HTTP Proxy

Works only for web traffic (HTTP and HTTPS). You configure it in your browser settings. It only affects browser traffic — not other apps like games, desktop software, or system updates.

SOCKS Proxy (SOCKS4 / SOCKS5)

More versatile than HTTP proxies. SOCKS5 works with any type of traffic — not just web browsing. Supports UDP, useful for torrenting and gaming. Still no encryption by default.

Transparent Proxy

You might not even know you're using one. ISPs and businesses often use transparent proxies to cache content or filter traffic. Your IP is still visible to the destination — these are about performance and content control, not privacy.

Anonymous Proxy

Hides your IP from the destination website. The website knows a proxy is being used but can't see your real IP.

Elite (High Anonymity) Proxy

Hides your IP and doesn't reveal that a proxy is being used at all. The website sees a regular connection from an IP it doesn't recognise as a proxy.

Reverse Proxy

Used by websites, not users. Sits in front of web servers to distribute traffic, cache content, and protect the origin server. Cloudflare is essentially a massive reverse proxy network.

What a Proxy Does NOT Do

This is critical to understand before relying on a proxy for privacy:

• No encryption — standard proxies don't encrypt your traffic. Your ISP can still see what you're doing.
• Only covers configured apps — an HTTP proxy in your browser doesn't protect other apps on your computer
• Operator can see your traffic — the proxy server operator sees all unencrypted traffic passing through
• Free proxies are risky — many log traffic, inject ads, or are operated by malicious actors

Proxy vs VPN — Key Difference

The main difference: a VPN encrypts all traffic from your entire device. A proxy just reroutes traffic from one app, with no encryption.

Read our full comparison: VPN vs Proxy →

When Should You Use a Proxy?

Proxies are useful in specific situations:

• Bypass a simple IP block — accessing a geo-blocked page quickly without installing software
• Corporate network access — many business tools route traffic through proxies for security monitoring
• Web scraping — rotating proxy pools let scrapers avoid IP-based rate limiting
• Testing from different locations — developers use proxies to test how their site appears from other countries

For everyday privacy, a VPN is a better choice. For quick, lightweight tasks where encryption doesn't matter, a proxy works fine.

If you want to hide your IP entirely, see all the methods here →

How to Check if You're Behind a Proxy

Visit IPLocator — it shows your current IP, ISP, and whether your connection appears to be coming from a data centre or proxy range. If the ISP field shows a hosting company rather than a residential ISP, you're likely on a proxy or VPN exit node.

Free Proxy Safety Warning

Free proxy lists are widely available online, but they come with serious risks:

• Many are run by unknown operators who log and sell traffic data
• Some inject JavaScript into pages to display ads or steal form data
• HTTPS proxies can perform man-in-the-middle attacks on SSL connections if you accept their certificate
• Many are operated by botnets using compromised machines

If you need a proxy, use a paid service from a reputable provider, or better yet, use a VPN that includes SOCKS5 proxy support (NordVPN and Mullvad both do this).