IP, Privacy & Security
What Is a Proxy Server?
A proxy server is a middleman for your internet traffic. It's a simple, versatile idea that shows up everywhere from privacy tools to giant websites.
The middleman
A proxy server receives your requests, forwards them to their destination, and passes the responses back to you. To the destination, the request appears to come from the proxy, not from you — so your real IP address is hidden behind the proxy's.
Forward proxies: for users
A forward proxy sits in front of users and represents them to the internet. This is the kind used to hide an IP address, filter content, or appear to browse from another location. Businesses and schools often route traffic through a forward proxy to enforce policies and cache popular content.
Reverse proxies: for servers
A reverse proxy sits in front of servers and represents them to users. When you visit a large website, you're often talking to a reverse proxy that distributes load across many back-end servers, adds security, and caches content. Content delivery networks are essentially giant reverse-proxy systems placed close to users worldwide.
Proxy vs. VPN
The two overlap but differ in important ways:
- A proxy usually handles one application (like your browser); a VPN covers your entire device.
- A proxy often provides little or no encryption; a VPN encrypts everything.
- Proxies can be lighter and faster; VPNs are more comprehensive and secure.
When to use a proxy
Proxies shine for simple, targeted jobs: making a single app appear to be in another region, caching, content filtering, or lightweight IP masking where encryption isn't essential. For serious privacy on an untrusted network, a VPN is the stronger tool. And if you route a browser through a proxy, checking IP Ducky is a fast way to confirm the destination now sees the proxy's address instead of yours.