How a proxy server works
You configure an application with the proxy’s host, port and often a username and password. Instead of connecting directly to a website, the application connects to the proxy and names the target. After proxy authentication, the proxy opens another connection, forwards the request and returns the response.
Application → proxy server → example.com
← ←The target records the proxy’s exit IP address rather than your public IP. With a proxy pool, the entry hostname can remain the same while the exit IP changes between requests or sessions.
Forward vs reverse proxy servers
“Proxy server” can describe two different positions in a connection: a forward proxy represents the client, while a reverse proxy represents the website.
| Forward proxy | Reverse proxy | |
|---|---|---|
| Represents | User or client | Website servers |
| Chosen by | User or network administrator | Website operator |
| Common jobs | Route or filter outgoing data | Balance, cache and filter traffic |
Commercial proxies used for data collection, account workflows and location testing are usually forward proxies.
What a proxy changes
- Visible IP: The destination sees the proxy’s exit IP for traffic routed through it.
- Apparent location: An exit IP geolocated in another region can change localized prices, search results or content.
- Traffic scope: Only configured applications use the proxy. Other apps may still connect directly.
- Identity signals: A proxy doesn’t erase cookies, headers, browser fingerprints or behavioral patterns.
For collection and testing, keep request rates within the site’s limits and respect its robots.txt and terms. Changing IPs doesn’t grant access to private data or restricted accounts.
Proxy servers on FlashIP
FlashIP offers rotating residential proxies, mobile proxies, static ISP proxies and datacenter proxies in one account. Residential Request mode changes the exit IP on every request, while sticky sessions hold one IP for 30, 60, 90 or 120 minutes. Residential proxies support country, state, city and ASN targeting. Static ISP and datacenter proxies provide fixed exit IPs.
FAQ
Can a proxy server hide my IP address?
Yes, for traffic sent through it. The destination usually sees the proxy’s exit IP, but direct traffic from other applications or browser leaks may still expose other addresses.
Is a proxy server the same as a VPN?
No. A proxy usually routes traffic from configured applications, while a VPN usually creates a system-level tunnel for device traffic.
Does a proxy server encrypt internet traffic?
No, not by itself. HTTPS can protect content between your application and the website through a forwarding proxy, but encryption depends on the protocol and configuration.