A proxy server acts as an intermediary between your device and the internet. When you send a request through a proxy, the request goes to the proxy server first, which then forwards it to the destination on your behalf. The destination sees the proxy's IP address, not yours.
Proxies are used for privacy, performance (caching), content filtering, and bypassing geographic restrictions. Unlike VPNs, most proxies operate at the application level — they route traffic from a specific app or browser, not your entire device.
The key difference: a proxy relays your traffic, while a VPN encrypts it and routes it through a secure tunnel. Both hide your IP from the destination, but the level of security and scope differs significantly.
Works with HTTP and HTTPS traffic only. Configured in your browser or OS network settings. The proxy can inspect unencrypted HTTP traffic. For HTTPS, it typically uses the CONNECT method to establish a tunnel — the content remains encrypted end-to-end, but the proxy knows which domain you're connecting to.
Operates at a lower level than HTTP proxies and can handle any type of traffic — HTTP, FTP, SMTP, torrents. SOCKS5 also supports UDP and authentication. More versatile than HTTP proxies, used by applications like torrent clients and SSH tunnels.
Intercepts traffic without modifying requests and without requiring client configuration. Often used by ISPs for caching, and by schools/businesses for content filtering. You may not even know you're behind one. The destination may still see headers revealing the proxy's presence.
Sits in front of web servers, not clients. Clients connect to the reverse proxy, which forwards requests to backend servers. Used for load balancing, SSL termination, caching, and DDoS protection. Cloudflare, Nginx, and HAProxy are commonly used as reverse proxies.
| Level | Hides IP? | Reveals proxy? |
|---|---|---|
| Transparent | No | Yes (X-Forwarded-For header) |
| Anonymous | Yes | Yes (identifies as proxy) |
| Elite (High Anonymity) | Yes | No |
IP addresses assigned to servers in commercial data centres. Fast and cheap, but easily detected and blocked because datacenter IPs are well-known and don't belong to real ISP customers. Used for scraping, price monitoring, and bypassing simple geo-blocks.
IP addresses assigned by ISPs to real home users, who have opted to share their connection through a proxy network. Much harder to detect and block because they appear as legitimate home users. Significantly more expensive. Used when datacenter proxies are blocked.
Automatically cycle through a pool of IP addresses with each request or on a timer. Used for large-scale web scraping to avoid rate limiting and IP bans.
| Feature | Proxy | VPN |
|---|---|---|
| Encryption | Usually none | Full encryption |
| Scope | App-level (browser, client) | System-wide (all traffic) |
| DNS leak protection | No | Yes (good VPNs) |
| Speed | Faster (no encryption overhead) | Slightly slower |
| Cost | Often free (lower quality) | Typically paid |
| Authentication | Often none (SOCKS5 supports it) | Always |
| Best for | Bypassing geo-blocks, scraping | Privacy, security |
Free proxy lists are widely available, but come with serious risks:
If privacy matters, use a reputable paid VPN instead of a free proxy.
Settings → Network & Internet → Proxy → Manual proxy setup. Enter the proxy address and port.
System Preferences → Network → Advanced → Proxies tab.
Firefox: Settings → Network Settings → Manual proxy. Chrome uses the OS proxy settings by default.
You can create a SOCKS5 proxy tunnel through any SSH server you have access to:
ssh -D 1080 -N user@your-server.com
Then point your browser's SOCKS5 proxy to 127.0.0.1:1080. All browser traffic routes through your server.
Websites use several techniques to detect proxies and VPNs:
Check your IP's proxy/VPN classification using ip-tracker.eu.
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